31519772852 has 12 divisors (see below), whose sum is σ = 55665654660. Its totient is φ = 15615300096.

The previous prime is 31519772833. The next prime is 31519772891. The reversal of 31519772852 is 25827791513.

It can be written as a sum of positive squares in 2 ways, for example, as 19155667216 + 12364105636 = 138404^2 + 111194^2 .

It is a super-5 number, since 5×31519772852⁵ (a number of 54 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31519772852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36146093 + ... + 36146964.

It is an arithmetic number, because the mean of its divisors is an integer number (4638804555).

Almost surely, 2^31519772852 is an apocalyptic number.

It is an amenable number.

31519772852 is a deficient number, since it is larger than the sum of its proper divisors (24145881808).

31519772852 is a wasteful number, since it uses less digits than its factorization.

31519772852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72293170 (or 72293168 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The spelling of 31519772852 in words is "thirty-one billion, five hundred nineteen million, seven hundred seventy-two thousand, eight hundred fifty-two".