157768331 has 24 divisors (see below), whose sum is σ = 190656000. Its totient is φ = 127826640.

The previous prime is 157768327. The next prime is 157768349. The reversal of 157768331 is 133867751.

It is not a de Polignac number, because 157768331 - 2² = 157768327 is a prime.

It is a super-2 number, since 2×157768331² = 49781692533051122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157768361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315920 + ... + 316418.

It is an arithmetic number, because the mean of its divisors is an integer number (7944000).

Almost surely, 2^157768331 is an apocalyptic number.

157768331 is a deficient number, since it is larger than the sum of its proper divisors (32887669).

157768331 is an equidigital number, since it uses as much as digits as its factorization.

157768331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 584 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 157768331 is about 12560.5864114698. The cubic root of 157768331 is about 540.3476624941.

The spelling of 157768331 in words is "one hundred fifty-seven million, seven hundred sixty-eight thousand, three hundred thirty-one".