Suryanarayana Ashtottara Shatanamavali, the 108 names of Bhagavan Suryanarayan, is a powerful prayer dedicated to Bhagavan Suryanarayan. Below is the Suryanarayana Ashtottara Shatanamavali in Tamil text in pdf. The prayer is chanted on Sundays and on seventh day of a fortnight (saptami tithi). The prayer is chanted mainly for good health and for healing skin related problems.
Link – Tamil Suryanarayana Ashtottara Shatanamavali
The prayer is chanted during Magh Saptami and also during Ratha Saptami. It is also chanted on Bhanu Saptami day.
The mantra is also chanted for achieving peace and prosperity. It is believed that chanting the 108 names of Suryanarayana during sunrise helps in desire fulfillment.