31413251720 has 16 divisors (see below), whose sum is σ = 70679816460. Its totient is φ = 12565300672.

The previous prime is 31413251717. The next prime is 31413251747. The reversal of 31413251720 is 2715231413.

It can be written as a sum of positive squares in 2 ways, for example, as 31052783524 + 360468196 = 176218^2 + 18986^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392665607 + ... + 392665686.

Almost surely, 2^31413251720 is an apocalyptic number.

It is an amenable number.

31413251720 is an abundant number, since it is smaller than the sum of its proper divisors (39266564740).

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

31413251720 is a wasteful number, since it uses less digits than its factorization.

31413251720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785331304 (or 785331300 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 31413251720 in words is "thirty-one billion, four hundred thirteen million, two hundred fifty-one thousand, seven hundred twenty".