31312531450 has 12 divisors (see below), whose sum is σ = 58241308590. Its totient is φ = 12525012560.

The previous prime is 31312531447. The next prime is 31312531457. The reversal of 31312531450 is 5413521313.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 30685579929 + 626951521 = 175173^2 + 25039^2 .

It is not an unprimeable number, because it can be changed into a prime (31312531457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313125265 + ... + 313125364.

Almost surely, 2^31312531450 is an apocalyptic number.

31312531450 is a deficient number, since it is larger than the sum of its proper divisors (26928777140).

31312531450 is a wasteful number, since it uses less digits than its factorization.

31312531450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626250641 (or 626250636 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The spelling of 31312531450 in words is "thirty-one billion, three hundred twelve million, five hundred thirty-one thousand, four hundred fifty".