231513357 has 8 divisors (see below), whose sum is σ = 309074976. Its totient is φ = 154146992.

The previous prime is 231513353. The next prime is 231513367. The reversal of 231513357 is 753315132.

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 231513357 - 2² = 231513353 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231513353) 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, 46023 + ... + 50804.

It is an arithmetic number, because the mean of its divisors is an integer number (38634372).

Almost surely, 2^231513357 is an apocalyptic number.

It is an amenable number.

231513357 is a deficient number, since it is larger than the sum of its proper divisors (77561619).

231513357 is an equidigital number, since it uses as much as digits as its factorization.

231513357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97627.

The product of its digits is 9450, while the sum is 30.

The square root of 231513357 is about 15215.5629866266. The cubic root of 231513357 is about 614.0334317793.

Adding to 231513357 its reverse (753315132), we get a palindrome (984828489).

The spelling of 231513357 in words is "two hundred thirty-one million, five hundred thirteen thousand, three hundred fifty-seven".