231331999959 has 6 divisors (see below), whose sum is σ = 334146222176. Its totient is φ = 154221333300.

The previous prime is 231331999901. The next prime is 231331999973. The reversal of 231331999959 is 959999133132.

It is not a de Polignac number, because 231331999959 - 2¹² = 231331995863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231331999896 and 231331999905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331999159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12851777767 + ... + 12851777784.

Almost surely, 2^231331999959 is an apocalyptic number.

231331999959 is a deficient number, since it is larger than the sum of its proper divisors (102814222217).

231331999959 is a wasteful number, since it uses less digits than its factorization.

231331999959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25703555557 (or 25703555554 counting only the distinct ones).

The product of its digits is 15943230, while the sum is 63.

The spelling of 231331999959 in words is "two hundred thirty-one billion, three hundred thirty-one million, nine hundred ninety-nine thousand, nine hundred fifty-nine".