157297402531 has 4 divisors (see below), whose sum is σ = 157620395632. Its totient is φ = 156974409432.

The previous prime is 157297402517. The next prime is 157297402541. The reversal of 157297402531 is 135204792751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157297402531 - 2⁷ = 157297402403 is a prime.

It is a super-2 number, since 2×157297402531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157297402501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161495820 + ... + 161496793.

It is an arithmetic number, because the mean of its divisors is an integer number (39405098908).

Almost surely, 2^157297402531 is an apocalyptic number.

157297402531 is a deficient number, since it is larger than the sum of its proper divisors (322993101).

157297402531 is an equidigital number, since it uses as much as digits as its factorization.

157297402531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322993100.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 157297402531 in words is "one hundred fifty-seven billion, two hundred ninety-seven million, four hundred two thousand, five hundred thirty-one".