31234157 has 8 divisors (see below), whose sum is σ = 32931360. Its totient is φ = 29542320.

The previous prime is 31234141. The next prime is 31234183. The reversal of 31234157 is 75143213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31234157 - 2⁴ = 31234141 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 (31234657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17603 + ... + 19295.

It is an arithmetic number, because the mean of its divisors is an integer number (4116420).

Almost surely, 2^31234157 is an apocalyptic number.

It is an amenable number.

31234157 is a deficient number, since it is larger than the sum of its proper divisors (1697203).

31234157 is a wasteful number, since it uses less digits than its factorization.

31234157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683.

The product of its digits is 2520, while the sum is 26.

The square root of 31234157 is about 5588.7527231038. The cubic root of 31234157 is about 314.9270243314.

The spelling of 31234157 in words is "thirty-one million, two hundred thirty-four thousand, one hundred fifty-seven".