31097412 has 24 divisors (see below), whose sum is σ = 80623200. Its totient is φ = 10365768.

The previous prime is 31097399. The next prime is 31097413. The reversal of 31097412 is 21479013.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31097413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143862 + ... + 144077.

It is an arithmetic number, because the mean of its divisors is an integer number (3359300).

Almost surely, 2^31097412 is an apocalyptic number.

It is an amenable number.

31097412 is an abundant number, since it is smaller than the sum of its proper divisors (49525788).

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

31097412 is a wasteful number, since it uses less digits than its factorization.

31097412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287952 (or 287944 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 31097412 is about 5576.5053573004. The cubic root of 31097412 is about 314.4667622338.

The spelling of 31097412 in words is "thirty-one million, ninety-seven thousand, four hundred twelve".