231551508963 has 16 divisors (see below), whose sum is σ = 310173579936. Its totient is φ = 153649205760.

The previous prime is 231551508941. The next prime is 231551509003. The reversal of 231551508963 is 369805155132.

It is a happy number.

It is not a de Polignac number, because 231551508963 - 2⁵ = 231551508931 is a prime.

It is a super-2 number, since 2×231551508963² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231551508163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1363645 + ... + 1524017.

It is an arithmetic number, because the mean of its divisors is an integer number (19385848746).

Almost surely, 2^231551508963 is an apocalyptic number.

231551508963 is a deficient number, since it is larger than the sum of its proper divisors (78622070973).

231551508963 is a wasteful number, since it uses less digits than its factorization.

231551508963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162614.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 231551508963 in words is "two hundred thirty-one billion, five hundred fifty-one million, five hundred eight thousand, nine hundred sixty-three".