31081368 has 16 divisors (see below), whose sum is σ = 77703480. Its totient is φ = 10360448.

The previous prime is 31081363. The next prime is 31081433. The reversal of 31081368 is 86318013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31081361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647505 + ... + 647552.

Almost surely, 2^31081368 is an apocalyptic number.

It is an amenable number.

31081368 is an abundant number, since it is smaller than the sum of its proper divisors (46622112).

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

31081368 is a wasteful number, since it uses less digits than its factorization.

31081368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295066 (or 1295062 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 31081368 is about 5575.0666363731. The cubic root of 31081368 is about 314.4126722809.

The spelling of 31081368 in words is "thirty-one million, eighty-one thousand, three hundred sixty-eight".