157985331 has 16 divisors (see below), whose sum is σ = 248506368. Its totient is φ = 87364800.

The previous prime is 157985329. The next prime is 157985339. The reversal of 157985331 is 133589751.

157985331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157985331 - 2¹ = 157985329 is a prime.

It is a super-2 number, since 2×157985331² = 49918729622359122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157985339) 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, 120690 + ... + 121991.

It is an arithmetic number, because the mean of its divisors is an integer number (15531648).

Almost surely, 2^157985331 is an apocalyptic number.

157985331 is a deficient number, since it is larger than the sum of its proper divisors (90521037).

157985331 is a wasteful number, since it uses less digits than its factorization.

157985331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242722.

The product of its digits is 113400, while the sum is 42.

The square root of 157985331 is about 12569.2215749425. The cubic root of 157985331 is about 540.5952865980.

The spelling of 157985331 in words is "one hundred fifty-seven million, nine hundred eighty-five thousand, three hundred thirty-one".