311997465 has 96 divisors (see below), whose sum is σ = 607326720. Its totient is φ = 147184128.

The previous prime is 311997437. The next prime is 311997473. The reversal of 311997465 is 564799113.

It is not a de Polignac number, because 311997465 - 2⁷ = 311997337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 311997465.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1987167 + ... + 1987323.

It is an arithmetic number, because the mean of its divisors is an integer number (6326320).

Almost surely, 2^311997465 is an apocalyptic number.

It is an amenable number.

311997465 is a deficient number, since it is larger than the sum of its proper divisors (295329255).

311997465 is a wasteful number, since it uses less digits than its factorization.

311997465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 300 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 311997465 is about 17663.4499744529. The cubic root of 311997465 is about 678.2404516917.

The spelling of 311997465 in words is "three hundred eleven million, nine hundred ninety-seven thousand, four hundred sixty-five".