311867145 has 32 divisors (see below), whose sum is σ = 562256640. Its totient is φ = 163981440.

The previous prime is 311867141. The next prime is 311867167. The reversal of 311867145 is 541768113.

It is not a de Polignac number, because 311867145 - 2² = 311867141 is a prime.

It is a super-2 number, since 2×311867145² = 194522232260902050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (311867141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6684 + ... + 25853.

It is an arithmetic number, because the mean of its divisors is an integer number (17570520).

Almost surely, 2^311867145 is an apocalyptic number.

It is an amenable number.

311867145 is a deficient number, since it is larger than the sum of its proper divisors (250389495).

311867145 is a wasteful number, since it uses less digits than its factorization.

311867145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32622 (or 32616 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 311867145 is about 17659.7606155916. The cubic root of 311867145 is about 678.1460058335.

The spelling of 311867145 in words is "three hundred eleven million, eight hundred sixty-seven thousand, one hundred forty-five".