31995437915401 has 9 divisors (see below), whose sum is σ = 32309677448391. Its totient is φ = 31684225637832.

The previous prime is 31995437915393. The next prime is 31995437915459. The reversal of 31995437915401 is 10451973459913.

The square root of 31995437915401 is 5656451.

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., 11167861167225 + 20827576748176 = 3341835^2 + 4563724^2 .

It is not a de Polignac number, because 31995437915401 - 2³ = 31995437915393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31995437915401.

It is not an unprimeable number, because it can be changed into a prime (31995437912401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 582586995 + ... + 582641911.

Almost surely, 2^{31995437915401} is an apocalyptic number.

31995437915401 is the 5656451-st square number.

31995437915401 is the 2828226-th centered octagonal number.

It is an amenable number.

31995437915401 is a deficient number, since it is larger than the sum of its proper divisors (314239532990).

31995437915401 is an frugal number, since it uses more digits than its factorization.

31995437915401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110040 (or 55020 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 61.

The spelling of 31995437915401 in words is "thirty-one trillion, nine hundred ninety-five billion, four hundred thirty-seven million, nine hundred fifteen thousand, four hundred one".