31431312312 has 64 divisors (see below), whose sum is σ = 79402152960. Its totient is φ = 10367376000.

The previous prime is 31431312301. The next prime is 31431312389. The reversal of 31431312312 is 21321313413.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6569073 + ... + 6573855.

It is an arithmetic number, because the mean of its divisors is an integer number (1240658640).

Almost surely, 2^31431312312 is an apocalyptic number.

It is an amenable number.

31431312312 is an abundant number, since it is smaller than the sum of its proper divisors (47970840648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31431312312 is a wasteful number, since it uses less digits than its factorization.

31431312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7604 (or 7600 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 31431312312 its reverse (21321313413), we get a palindrome (52752625725).

The spelling of 31431312312 in words is "thirty-one billion, four hundred thirty-one million, three hundred twelve thousand, three hundred twelve".