31197712 has 60 divisors (see below), whose sum is σ = 75747756. Its totient is φ = 12337920.

The previous prime is 31197709. The next prime is 31197713. The reversal of 31197712 is 21779113.

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 12845056 = 4284^2 + 3584^2 .

It is not an unprimeable number, because it can be changed into a prime (31197713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8662 + ... + 11722.

Almost surely, 2^31197712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31197712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37873878).

31197712 is an abundant number, since it is smaller than the sum of its proper divisors (44550044).

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

31197712 is a wasteful number, since it uses less digits than its factorization.

31197712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096 (or 3083 counting only the distinct ones).

The product of its digits is 2646, while the sum is 31.

The square root of 31197712 is about 5585.4912048986. The cubic root of 31197712 is about 314.8044877292.

The spelling of 31197712 in words is "thirty-one million, one hundred ninety-seven thousand, seven hundred twelve".