31268515072 has 36 divisors (see below), whose sum is σ = 66086360676. Its totient is φ = 14714593280.

The previous prime is 31268515063. The next prime is 31268515093. The reversal of 31268515072 is 27051586213.

It can be written as a sum of positive squares in 2 ways, for example, as 12637357056 + 18631158016 = 112416^2 + 136496^2 .

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 3 ways as a sum of consecutive naturals, for example, 3588079 + ... + 3596782.

It is an arithmetic number, because the mean of its divisors is an integer number (1835732241).

Almost surely, 2^31268515072 is an apocalyptic number.

31268515072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31268515072 is an abundant number, since it is smaller than the sum of its proper divisors (34817845604).

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

31268515072 is an equidigital number, since it uses as much as digits as its factorization.

31268515072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7184894 (or 7184880 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 31268515072 in words is "thirty-one billion, two hundred sixty-eight million, five hundred fifteen thousand, seventy-two".