231044157 has 28 divisors (see below), whose sum is σ = 347639580. Its totient is φ = 153482688.

The previous prime is 231044087. The next prime is 231044159. The reversal of 231044157 is 751440132.

It can be written as a sum of positive squares in 2 ways, for example, as 28579716 + 202464441 = 5346^2 + 14229^2 .

It is not a de Polignac number, because 231044157 - 2²³ = 222655549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 231044157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231044159) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 405769 + ... + 406337.

Almost surely, 2^231044157 is an apocalyptic number.

231044157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

231044157 is a deficient number, since it is larger than the sum of its proper divisors (116595423).

231044157 is an frugal number, since it uses more digits than its factorization.

231044157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 231044157 is about 15200.1367428060. The cubic root of 231044157 is about 613.6183378947.

Adding to 231044157 its reverse (751440132), we get a palindrome (982484289).

It can be divided in two parts, 23104 and 4157, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 231044157 in words is "two hundred thirty-one million, forty-four thousand, one hundred fifty-seven".