31859751049 has 27 divisors (see below), whose sum is σ = 38007371943. Its totient is φ = 26628299712.

The previous prime is 31859751043. The next prime is 31859751073. The reversal of 31859751049 is 94015795813.

The square root of 31859751049 is 178493.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19590201225 + 12269549824 = 139965^2 + 110768^2 .

It is not a de Polignac number, because 31859751049 - 2²³ = 31851362441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31859750987 and 31859751005.

It is not an unprimeable number, because it can be changed into a prime (31859751043) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 53726097 + ... + 53726689.

Almost surely, 2^31859751049 is an apocalyptic number.

31859751049 is the 178493-rd square number.

31859751049 is the 89247-th centered octagonal number.

It is an amenable number.

31859751049 is a deficient number, since it is larger than the sum of its proper divisors (6147620894).

31859751049 is an frugal number, since it uses more digits than its factorization.

31859751049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 31859751049 in words is "thirty-one billion, eight hundred fifty-nine million, seven hundred fifty-one thousand, forty-nine".