157318497 has 16 divisors (see below), whose sum is σ = 266359680. Its totient is φ = 89896176.

The previous prime is 157318489. The next prime is 157318529. The reversal of 157318497 is 794813751.

157318497 is a `hidden beast` number, since 157 + 3 + 1 + 8 + 497 = 666.

It is not a de Polignac number, because 157318497 - 2³ = 157318489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157318097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415998 + ... + 416375.

It is an arithmetic number, because the mean of its divisors is an integer number (16647480).

Almost surely, 2^157318497 is an apocalyptic number.

It is an amenable number.

157318497 is a deficient number, since it is larger than the sum of its proper divisors (109041183).

157318497 is an equidigital number, since it uses as much as digits as its factorization.

157318497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832389 (or 832383 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 157318497 is about 12542.6670608766. The cubic root of 157318497 is about 539.8336215822.

The spelling of 157318497 in words is "one hundred fifty-seven million, three hundred eighteen thousand, four hundred ninety-seven".