231123999 has 8 divisors (see below), whose sum is σ = 324384640. Its totient is φ = 145973016.

The previous prime is 231123989. The next prime is 231124007. The reversal of 231123999 is 999321132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231123999 - 2⁴ = 231123983 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 (231123979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2027347 + ... + 2027460.

It is an arithmetic number, because the mean of its divisors is an integer number (40548080).

Almost surely, 2^231123999 is an apocalyptic number.

231123999 is a deficient number, since it is larger than the sum of its proper divisors (93260641).

231123999 is a wasteful number, since it uses less digits than its factorization.

231123999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054829.

The product of its digits is 26244, while the sum is 39.

The square root of 231123999 is about 15202.7628738989. The cubic root of 231123999 is about 613.6890125132.

The spelling of 231123999 in words is "two hundred thirty-one million, one hundred twenty-three thousand, nine hundred ninety-nine".