312431402 has 16 divisors (see below), whose sum is σ = 514762560. Its totient is φ = 141558912.

The previous prime is 312431381. The next prime is 312431407. The reversal of 312431402 is 204134213.

It is a super-2 number, since 2×312431402² = 195226761911371208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312431407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177863 + ... + 179610.

It is an arithmetic number, because the mean of its divisors is an integer number (32172660).

Almost surely, 2^312431402 is an apocalyptic number.

312431402 is a deficient number, since it is larger than the sum of its proper divisors (202331158).

312431402 is a wasteful number, since it uses less digits than its factorization.

312431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357517.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 312431402 is about 17675.7291787355. The cubic root of 312431402 is about 678.5547462164.

Adding to 312431402 its reverse (204134213), we get a palindrome (516565615).

The spelling of 312431402 in words is "three hundred twelve million, four hundred thirty-one thousand, four hundred two".