157240331 has 4 divisors (see below), whose sum is σ = 157927200. Its totient is φ = 156553464.

The previous prime is 157240313. The next prime is 157240337. The reversal of 157240331 is 133042751.

157240331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157240331 is a prime.

It is a super-2 number, since 2×157240331² = 49449043385979122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157240331.

It is not an unprimeable number, because it can be changed into a prime (157240337) 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, 343091 + ... + 343548.

It is an arithmetic number, because the mean of its divisors is an integer number (39481800).

Almost surely, 2^157240331 is an apocalyptic number.

157240331 is a deficient number, since it is larger than the sum of its proper divisors (686869).

157240331 is an equidigital number, since it uses as much as digits as its factorization.

157240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686868.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 157240331 is about 12539.5506697808. The cubic root of 157240331 is about 539.7441986890.

The spelling of 157240331 in words is "one hundred fifty-seven million, two hundred forty thousand, three hundred thirty-one".