231433091936279 has 4 divisors (see below), whose sum is σ = 235355686714920. Its totient is φ = 227510497157640.

The previous prime is 231433091936213. The next prime is 231433091936317. The reversal of 231433091936279 is 972639190334132.

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 231433091936279 - 2²⁴ = 231433075159063 is a prime.

It is a super-2 number, since 2×231433091936279² (a number of 30 digits) contains 22 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 (231433091936779) 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, 1961297389232 + ... + 1961297389349.

It is an arithmetic number, because the mean of its divisors is an integer number (58838921678730).

Almost surely, 2^{231433091936279} is an apocalyptic number.

231433091936279 is a deficient number, since it is larger than the sum of its proper divisors (3922594778641).

231433091936279 is an equidigital number, since it uses as much as digits as its factorization.

231433091936279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922594778640.

The product of its (nonzero) digits is 39680928, while the sum is 62.

The spelling of 231433091936279 in words is "two hundred thirty-one trillion, four hundred thirty-three billion, ninety-one million, nine hundred thirty-six thousand, two hundred seventy-nine".