31552157 has 16 divisors (see below), whose sum is σ = 39887232. Its totient is φ = 24287040.

The previous prime is 31552139. The next prime is 31552193. The reversal of 31552157 is 75125513.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31552157 - 2⁸ = 31551901 is a prime.

It is a super-2 number, since 2×31552157² = 1991077222705298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31552127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (2492952).

Almost surely, 2^31552157 is an apocalyptic number.

31552157 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

31552157 is a deficient number, since it is larger than the sum of its proper divisors (8335075).

31552157 is a wasteful number, since it uses less digits than its factorization.

31552157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9428.

The product of its digits is 5250, while the sum is 29.

The square root of 31552157 is about 5617.1306732174. The cubic root of 31552157 is about 315.9921918970.

The spelling of 31552157 in words is "thirty-one million, five hundred fifty-two thousand, one hundred fifty-seven".