31187052 has 96 divisors (see below), whose sum is σ = 88356800. Its totient is φ = 9455616.

The previous prime is 31187047. The next prime is 31187059. The reversal of 31187052 is 25078113.

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 (31187059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136074 + ... + 136302.

Almost surely, 2^31187052 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 31187052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44178400).

31187052 is an abundant number, since it is smaller than the sum of its proper divisors (57169748).

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

31187052 is a wasteful number, since it uses less digits than its factorization.

31187052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 31187052 is about 5584.5368653094. The cubic root of 31187052 is about 314.7686282819.

The spelling of 31187052 in words is "thirty-one million, one hundred eighty-seven thousand, fifty-two".