31104252 has 18 divisors (see below), whose sum is σ = 78624728. Its totient is φ = 10368072.

The previous prime is 31104223. The next prime is 31104259. The reversal of 31104252 is 25240113.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31104259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431968 + ... + 432039.

Almost surely, 2^31104252 is an apocalyptic number.

It is an amenable number.

31104252 is an abundant number, since it is smaller than the sum of its proper divisors (47520476).

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

31104252 is a wasteful number, since it uses less digits than its factorization.

31104252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864017 (or 864012 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31104252 is about 5577.1186108958. The cubic root of 31104252 is about 314.4898166171.

Adding to 31104252 its reverse (25240113), we get a palindrome (56344365).

The spelling of 31104252 in words is "thirty-one million, one hundred four thousand, two hundred fifty-two".