15982157 has 2 divisors, whose sum is σ = 15982158. Its totient is φ = 15982156.

The previous prime is 15982147. The next prime is 15982163. The reversal of 15982157 is 75128951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13402921 + 2579236 = 3661^2 + 1606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15982157 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15982157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15982117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7991078 + 7991079.

It is an arithmetic number, because the mean of its divisors is an integer number (7991079).

Almost surely, 2^15982157 is an apocalyptic number.

It is an amenable number.

15982157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15982157 is an equidigital number, since it uses as much as digits as its factorization.

15982157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 15982157 is about 3997.7690028315. The cubic root of 15982157 is about 251.8905052572.

The spelling of 15982157 in words is "fifteen million, nine hundred eighty-two thousand, one hundred fifty-seven".