231163157 has 4 divisors (see below), whose sum is σ = 235524780. Its totient is φ = 226801536.

The previous prime is 231163151. The next prime is 231163181. The reversal of 231163157 is 751361132.

231163157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191296561 + 39866596 = 13831^2 + 6314^2 .

It is a cyclic number.

It is not a de Polignac number, because 231163157 - 2⁸ = 231162901 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 (231163151) 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, 2180732 + ... + 2180837.

It is an arithmetic number, because the mean of its divisors is an integer number (58881195).

Almost surely, 2^231163157 is an apocalyptic number.

It is an amenable number.

231163157 is a deficient number, since it is larger than the sum of its proper divisors (4361623).

231163157 is an equidigital number, since it uses as much as digits as its factorization.

231163157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361622.

The product of its digits is 3780, while the sum is 29.

The square root of 231163157 is about 15204.0506773688. The cubic root of 231163157 is about 613.7236684807.

The spelling of 231163157 in words is "two hundred thirty-one million, one hundred sixty-three thousand, one hundred fifty-seven".