231032223 has 8 divisors (see below), whose sum is σ = 342270000. Its totient is φ = 154021464.

The previous prime is 231032209. The next prime is 231032233. The reversal of 231032223 is 322230132.

It is a happy number.

It is not a de Polignac number, because 231032223 - 2²¹ = 228935071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231032196 and 231032205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231032233) 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, 4278348 + ... + 4278401.

It is an arithmetic number, because the mean of its divisors is an integer number (42783750).

Almost surely, 2^231032223 is an apocalyptic number.

231032223 is a deficient number, since it is larger than the sum of its proper divisors (111237777).

231032223 is an equidigital number, since it uses as much as digits as its factorization.

231032223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556758 (or 8556752 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231032223 is about 15199.7441754787. The cubic root of 231032223 is about 613.6077727465.

Adding to 231032223 its reverse (322230132), we get a palindrome (553262355).

The spelling of 231032223 in words is "two hundred thirty-one million, thirty-two thousand, two hundred twenty-three".