312394131 has 16 divisors (see below), whose sum is σ = 528921600. Its totient is φ = 178510824.

The previous prime is 312394127. The next prime is 312394157. The reversal of 312394131 is 131493213.

It is not a de Polignac number, because 312394131 - 2² = 312394127 is a prime.

It is a super-2 number, since 2×312394131² = 195180186166490322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 312394095 and 312394104.

It is not an unprimeable number, because it can be changed into a prime (312394171) 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, 826251 + ... + 826628.

It is an arithmetic number, because the mean of its divisors is an integer number (33057600).

Almost surely, 2^312394131 is an apocalyptic number.

312394131 is a deficient number, since it is larger than the sum of its proper divisors (216527469).

312394131 is a wasteful number, since it uses less digits than its factorization.

312394131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652895 (or 1652889 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 312394131 is about 17674.6748484944. The cubic root of 312394131 is about 678.5277627789.

The spelling of 312394131 in words is "three hundred twelve million, three hundred ninety-four thousand, one hundred thirty-one".