157157523 has 16 divisors (see below), whose sum is σ = 233126560. Its totient is φ = 104636448.

The previous prime is 157157513. The next prime is 157157549. The reversal of 157157523 is 325751751.

It is a happy number.

157157523 is a `hidden beast` number, since 15 + 71 + 57 + 523 = 666.

It is not a de Polignac number, because 157157523 - 2⁸ = 157157267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157157513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20361 + ... + 26997.

It is an arithmetic number, because the mean of its divisors is an integer number (14570410).

Almost surely, 2^157157523 is an apocalyptic number.

157157523 is a deficient number, since it is larger than the sum of its proper divisors (75969037).

157157523 is an equidigital number, since it uses as much as digits as its factorization.

157157523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523 (or 7517 counting only the distinct ones).

The product of its digits is 36750, while the sum is 36.

The square root of 157157523 is about 12536.2483622494. The cubic root of 157157523 is about 539.6494329556.

The spelling of 157157523 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, five hundred twenty-three".