15715057 has 2 divisors, whose sum is σ = 15715058. Its totient is φ = 15715056.

The previous prime is 15715031. The next prime is 15715079. The reversal of 15715057 is 75051751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13868176 + 1846881 = 3724^2 + 1359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15715057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15715027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857528 + 7857529.

It is an arithmetic number, because the mean of its divisors is an integer number (7857529).

Almost surely, 2^15715057 is an apocalyptic number.

It is an amenable number.

15715057 is a deficient number, since it is larger than the sum of its proper divisors (1).

15715057 is an equidigital number, since it uses as much as digits as its factorization.

15715057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6125, while the sum is 31.

The square root of 15715057 is about 3964.2221178940. Note that the first 3 decimals coincide. The cubic root of 15715057 is about 250.4793841757.

The spelling of 15715057 in words is "fifteen million, seven hundred fifteen thousand, fifty-seven".