311948631 has 16 divisors (see below), whose sum is σ = 486470400. Its totient is φ = 197019864.

The previous prime is 311948599. The next prime is 311948671. The reversal of 311948631 is 136849113.

311948631 is a `hidden beast` number, since 3 + 1 + 19 + 4 + 8 + 631 = 666.

It is not a de Polignac number, because 311948631 - 2⁵ = 311948599 is a prime.

It is a super-2 number, since 2×311948631² = 194623896765548322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311948671) 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, 303531 + ... + 304556.

It is an arithmetic number, because the mean of its divisors is an integer number (30404400).

Almost surely, 2^311948631 is an apocalyptic number.

311948631 is a deficient number, since it is larger than the sum of its proper divisors (174521769).

311948631 is a wasteful number, since it uses less digits than its factorization.

311948631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608115 (or 608109 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 311948631 is about 17662.0675743244. The cubic root of 311948631 is about 678.2050636665.

The spelling of 311948631 in words is "three hundred eleven million, nine hundred forty-eight thousand, six hundred thirty-one".