31191412 has 48 divisors (see below), whose sum is σ = 64512000. Its totient is φ = 12920544.

The previous prime is 31191373. The next prime is 31191431. The reversal of 31191412 is 21419113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130389 + ... + 130627.

It is an arithmetic number, because the mean of its divisors is an integer number (1344000).

Almost surely, 2^31191412 is an apocalyptic number.

It is an amenable number.

31191412 is an abundant number, since it is smaller than the sum of its proper divisors (33320588).

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

31191412 is a wasteful number, since it uses less digits than its factorization.

31191412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 386 counting only the distinct ones).

The product of its digits is 216, while the sum is 22.

The square root of 31191412 is about 5584.9272152822. The cubic root of 31191412 is about 314.7832959852.

The spelling of 31191412 in words is "thirty-one million, one hundred ninety-one thousand, four hundred twelve".