311616431 has 12 divisors (see below), whose sum is σ = 362820960. Its totient is φ = 266857920.

The previous prime is 311616379. The next prime is 311616451. The reversal of 311616431 is 134616113.

It is a de Polignac number, because none of the positive numbers 2^k-311616431 is a prime.

It is a super-2 number, since 2×311616431² = 194209600138355522, 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 311616431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311616451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70826 + ... + 75096.

It is an arithmetic number, because the mean of its divisors is an integer number (30235080).

Almost surely, 2^311616431 is an apocalyptic number.

311616431 is a deficient number, since it is larger than the sum of its proper divisors (51204529).

311616431 is a wasteful number, since it uses less digits than its factorization.

311616431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5774 (or 5767 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 311616431 is about 17652.6607342916. The cubic root of 311616431 is about 677.9642336896.

The spelling of 311616431 in words is "three hundred eleven million, six hundred sixteen thousand, four hundred thirty-one".