231515442413 has 4 divisors (see below), whose sum is σ = 231659510880. Its totient is φ = 231371373948.

The previous prime is 231515442407. The next prime is 231515442493. The reversal of 231515442413 is 314244515132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231515442413 - 2¹⁴ = 231515426029 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 (231515442493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72031823 + ... + 72035036.

It is an arithmetic number, because the mean of its divisors is an integer number (57914877720).

Almost surely, 2^231515442413 is an apocalyptic number.

It is an amenable number.

231515442413 is a deficient number, since it is larger than the sum of its proper divisors (144068467).

231515442413 is a wasteful number, since it uses less digits than its factorization.

231515442413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144068466.

The product of its digits is 57600, while the sum is 35.

Adding to 231515442413 its reverse (314244515132), we get a palindrome (545759957545).

The spelling of 231515442413 in words is "two hundred thirty-one billion, five hundred fifteen million, four hundred forty-two thousand, four hundred thirteen".