31260252 has 12 divisors (see below), whose sum is σ = 72940616. Its totient is φ = 10420080.

The previous prime is 31260247. The next prime is 31260253. The reversal of 31260252 is 25206213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31260253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302499 + ... + 1302522.

Almost surely, 2^31260252 is an apocalyptic number.

It is an amenable number.

31260252 is an abundant number, since it is smaller than the sum of its proper divisors (41680364).

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

31260252 is a wasteful number, since it uses less digits than its factorization.

31260252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605028 (or 2605026 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 31260252 is about 5591.0868353121. The cubic root of 31260252 is about 315.0147032693.

Adding to 31260252 its reverse (25206213), we get a palindrome (56466465).

The spelling of 31260252 in words is "thirty-one million, two hundred sixty thousand, two hundred fifty-two".