231513023 has 16 divisors (see below), whose sum is σ = 270864384. Its totient is φ = 193752000.

The previous prime is 231513017. The next prime is 231513031. The reversal of 231513023 is 320315132.

It is a cyclic number.

It is not a de Polignac number, because 231513023 - 2⁸ = 231512767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231512986 and 231513004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231513523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246611 + ... + 247547.

It is an arithmetic number, because the mean of its divisors is an integer number (16929024).

Almost surely, 2^231513023 is an apocalyptic number.

231513023 is a deficient number, since it is larger than the sum of its proper divisors (39351361).

231513023 is an equidigital number, since it uses as much as digits as its factorization.

231513023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 231513023 is about 15215.5520110182. The cubic root of 231513023 is about 614.0331364943.

Adding to 231513023 its reverse (320315132), we get a palindrome (551828155).

The spelling of 231513023 in words is "two hundred thirty-one million, five hundred thirteen thousand, twenty-three".