31519242512 has 20 divisors (see below), whose sum is σ = 61071811020. Its totient is φ = 15758775168.

The previous prime is 31519242509. The next prime is 31519242539. The reversal of 31519242512 is 21524291513.

It can be written as a sum of positive squares in 2 ways, for example, as 19514972416 + 12004270096 = 139696^2 + 109564^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345314 + ... + 426942.

It is an arithmetic number, because the mean of its divisors is an integer number (3053590551).

Almost surely, 2^31519242512 is an apocalyptic number.

It is an amenable number.

31519242512 is a deficient number, since it is larger than the sum of its proper divisors (29552568508).

31519242512 is a wasteful number, since it uses less digits than its factorization.

31519242512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105770 (or 105764 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The spelling of 31519242512 in words is "thirty-one billion, five hundred nineteen million, two hundred forty-two thousand, five hundred twelve".