31107492 has 54 divisors (see below), whose sum is σ = 85163442. Its totient is φ = 9569664.

The previous prime is 31107469. The next prime is 31107493. The reversal of 31107492 is 29470113.

It can be written as a sum of positive squares in 3 ways, for example, as 3481956 + 27625536 = 1866^2 + 5256^2 .

It is not an unprimeable number, because it can be changed into a prime (31107493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3528 + ... + 8640.

Almost surely, 2^31107492 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 31107492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42581721).

31107492 is an abundant number, since it is smaller than the sum of its proper divisors (54055950).

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

31107492 is a wasteful number, since it uses less digits than its factorization.

31107492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149 (or 5131 counting only the distinct ones).

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

The square root of 31107492 is about 5577.4090759061. The cubic root of 31107492 is about 314.5007359348.

The spelling of 31107492 in words is "thirty-one million, one hundred seven thousand, four hundred ninety-two".