31296157 has 4 divisors (see below), whose sum is σ = 31358880. Its totient is φ = 31233436.

The previous prime is 31296149. The next prime is 31296197. The reversal of 31296157 is 75169213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31296157 - 2³ = 31296149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31296197) 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, 30607 + ... + 31612.

It is an arithmetic number, because the mean of its divisors is an integer number (7839720).

Almost surely, 2^31296157 is an apocalyptic number.

It is an amenable number.

31296157 is a deficient number, since it is larger than the sum of its proper divisors (62723).

31296157 is an equidigital number, since it uses as much as digits as its factorization.

31296157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62722.

The product of its digits is 11340, while the sum is 34.

The square root of 31296157 is about 5594.2968280205. The cubic root of 31296157 is about 315.1352639875.

It can be divided in two parts, 312 and 96157, that added together give a palindrome (96469).

The spelling of 31296157 in words is "thirty-one million, two hundred ninety-six thousand, one hundred fifty-seven".