231475243999 has 4 divisors (see below), whose sum is σ = 233767078200. Its totient is φ = 229183409800.

The previous prime is 231475243973. The next prime is 231475244023. The reversal of 231475243999 is 999342574132.

It is a happy number.

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 231475243999 - 2⁷ = 231475243871 is a prime.

It is a super-3 number, since 3×231475243999³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231475243939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145916949 + ... + 1145917150.

It is an arithmetic number, because the mean of its divisors is an integer number (58441769550).

Almost surely, 2^231475243999 is an apocalyptic number.

231475243999 is a deficient number, since it is larger than the sum of its proper divisors (2291834201).

231475243999 is a wasteful number, since it uses less digits than its factorization.

231475243999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291834200.

The product of its digits is 14696640, while the sum is 58.

The spelling of 231475243999 in words is "two hundred thirty-one billion, four hundred seventy-five million, two hundred forty-three thousand, nine hundred ninety-nine".