231551115162565 has 32 divisors (see below), whose sum is σ = 304668259545600. Its totient is φ = 167542767275520.

The previous prime is 231551115162527. The next prime is 231551115162611. The reversal of 231551115162565 is 565261511155132.

It is a happy number.

It is not a de Polignac number, because 231551115162565 - 2⁹ = 231551115162053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6309321 + ... + 22425649.

It is an arithmetic number, because the mean of its divisors is an integer number (9520883110800).

Almost surely, 2^{231551115162565} is an apocalyptic number.

It is an amenable number.

231551115162565 is a deficient number, since it is larger than the sum of its proper divisors (73117144383035).

231551115162565 is a wasteful number, since it uses less digits than its factorization.

231551115162565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16117677.

The product of its digits is 1350000, while the sum is 49.

The spelling of 231551115162565 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, one hundred fifteen million, one hundred sixty-two thousand, five hundred sixty-five".