311397152 has 24 divisors (see below), whose sum is σ = 668796912. Its totient is φ = 141544000.

The previous prime is 311397089. The next prime is 311397167. The reversal of 311397152 is 251793113.

It is a super-2 number, since 2×311397152² = 193936372547422208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441974 + ... + 442677.

It is an arithmetic number, because the mean of its divisors is an integer number (27866538).

Almost surely, 2^311397152 is an apocalyptic number.

311397152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

311397152 is an abundant number, since it is smaller than the sum of its proper divisors (357399760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311397152 is a wasteful number, since it uses less digits than its factorization.

311397152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884672 (or 884664 counting only the distinct ones).

The product of its digits is 5670, while the sum is 32.

The square root of 311397152 is about 17646.4487078845. The cubic root of 311397152 is about 677.8051725398.

The spelling of 311397152 in words is "three hundred eleven million, three hundred ninety-seven thousand, one hundred fifty-two".