231111023 has 8 divisors (see below), whose sum is σ = 271515216. Its totient is φ = 193939200.

The previous prime is 231111019. The next prime is 231111029. The reversal of 231111023 is 320111132.

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

It is not a de Polignac number, because 231111023 - 2² = 231111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231110989 and 231111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111029) 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, 807938 + ... + 808223.

It is an arithmetic number, because the mean of its divisors is an integer number (33939402).

Almost surely, 2^231111023 is an apocalyptic number.

231111023 is a deficient number, since it is larger than the sum of its proper divisors (40404193).

231111023 is a wasteful number, since it uses less digits than its factorization.

231111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616185.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 231111023 is about 15202.3361033757. The cubic root of 231111023 is about 613.6775275129.

Adding to 231111023 its reverse (320111132), we get a palindrome (551222155).

The spelling of 231111023 in words is "two hundred thirty-one million, one hundred eleven thousand, twenty-three".