31385252 has 12 divisors (see below), whose sum is σ = 55204380. Its totient is φ = 15612576.

The previous prime is 31385251. The next prime is 31385257. The reversal of 31385252 is 25258313.

It can be written as a sum of positive squares in 2 ways, for example, as 30184036 + 1201216 = 5494^2 + 1096^2 .

It is not an unprimeable number, because it can be changed into a prime (31385251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19127 + ... + 20702.

It is an arithmetic number, because the mean of its divisors is an integer number (4600365).

Almost surely, 2^31385252 is an apocalyptic number.

It is an amenable number.

31385252 is a deficient number, since it is larger than the sum of its proper divisors (23819128).

31385252 is a wasteful number, since it uses less digits than its factorization.

31385252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40030 (or 40028 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 31385252 is about 5602.2541891635. The cubic root of 31385252 is about 315.4340267067.

The spelling of 31385252 in words is "thirty-one million, three hundred eighty-five thousand, two hundred fifty-two".