312500000031 has 24 divisors (see below), whose sum is σ = 443640969744. Its totient is φ = 195625359360.

The previous prime is 312500000027. The next prime is 312500000047. The reversal of 312500000031 is 130000005213.

It is a happy number.

It is not a de Polignac number, because 312500000031 - 2² = 312500000027 is a prime.

It is a super-2 number, since 2×312500000031² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312500001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40800 + ... + 791621.

It is an arithmetic number, because the mean of its divisors is an integer number (18485040406).

Almost surely, 2^312500000031 is an apocalyptic number.

312500000031 is a deficient number, since it is larger than the sum of its proper divisors (131140969713).

312500000031 is a wasteful number, since it uses less digits than its factorization.

312500000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832891 (or 832874 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

Adding to 312500000031 its reverse (130000005213), we get a palindrome (442500005244).

The spelling of 312500000031 in words is "three hundred twelve billion, five hundred million, thirty-one", and thus it is an aban number.