231996279 has 4 divisors (see below), whose sum is σ = 309328376. Its totient is φ = 154664184.

The previous prime is 231996257. The next prime is 231996301. The reversal of 231996279 is 972699132.

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

It is an interprime number because it is at equal distance from previous prime (231996257) and next prime (231996301).

It is not a de Polignac number, because 231996279 - 2²⁵ = 198441847 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 (231996379) 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, 38666044 + ... + 38666049.

It is an arithmetic number, because the mean of its divisors is an integer number (77332094).

Almost surely, 2^231996279 is an apocalyptic number.

231996279 is a deficient number, since it is larger than the sum of its proper divisors (77332097).

231996279 is an equidigital number, since it uses as much as digits as its factorization.

231996279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77332096.

The product of its digits is 367416, while the sum is 48.

The square root of 231996279 is about 15231.4240634289. The cubic root of 231996279 is about 614.4600800360.

The spelling of 231996279 in words is "two hundred thirty-one million, nine hundred ninety-six thousand, two hundred seventy-nine".