31253157 has 48 divisors (see below), whose sum is σ = 54250560. Its totient is φ = 17127936.

The previous prime is 31253153. The next prime is 31253161. The reversal of 31253157 is 75135213.

It is an interprime number because it is at equal distance from previous prime (31253153) and next prime (31253161).

It is not a de Polignac number, because 31253157 - 2² = 31253153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31253157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31253153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37378 + ... + 38204.

It is an arithmetic number, because the mean of its divisors is an integer number (1130220).

Almost surely, 2^31253157 is an apocalyptic number.

It is an amenable number.

31253157 is a deficient number, since it is larger than the sum of its proper divisors (22997403).

31253157 is a wasteful number, since it uses less digits than its factorization.

31253157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 879 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 31253157 is about 5590.4523072825. The cubic root of 31253157 is about 314.9908689719.

The spelling of 31253157 in words is "thirty-one million, two hundred fifty-three thousand, one hundred fifty-seven".