231323009999 has 4 divisors (see below), whose sum is σ = 231346067064. Its totient is φ = 231299952936.

The previous prime is 231323009989. The next prime is 231323010001. The reversal of 231323009999 is 999900323132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231323009999 - 2²⁴ = 231306232783 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 (231323009989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11513477 + ... + 11533550.

It is an arithmetic number, because the mean of its divisors is an integer number (57836516766).

Almost surely, 2^231323009999 is an apocalyptic number.

231323009999 is a deficient number, since it is larger than the sum of its proper divisors (23057065).

231323009999 is a wasteful number, since it uses less digits than its factorization.

231323009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23057064.

The product of its (nonzero) digits is 708588, while the sum is 50.

The spelling of 231323009999 in words is "two hundred thirty-one billion, three hundred twenty-three million, nine thousand, nine hundred ninety-nine".