31260112 has 40 divisors (see below), whose sum is σ = 65761416. Its totient is φ = 14309376.

The previous prime is 31260109. The next prime is 31260143. The reversal of 31260112 is 21106213.

It can be written as a sum of positive squares in 4 ways, for example, as 524176 + 30735936 = 724^2 + 5544^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27948 + ... + 29044.

Almost surely, 2^31260112 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 31260112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32880708).

31260112 is an abundant number, since it is smaller than the sum of its proper divisors (34501304).

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

31260112 is a wasteful number, since it uses less digits than its factorization.

31260112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 31260112 is about 5591.0743153709. The cubic root of 31260112 is about 315.0142330010.

Adding to 31260112 its reverse (21106213), we get a palindrome (52366325).

The spelling of 31260112 in words is "thirty-one million, two hundred sixty thousand, one hundred twelve".