231031233 has 6 divisors (see below), whose sum is σ = 333711794. Its totient is φ = 154020816.

The previous prime is 231031223. The next prime is 231031253. The reversal of 231031233 is 332130132.

It can be written as a sum of positive squares in only one way, i.e., 156950784 + 74080449 = 12528^2 + 8607^2 .

It is not a de Polignac number, because 231031233 - 2⁵ = 231031201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231031223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12835060 + ... + 12835077.

Almost surely, 2^231031233 is an apocalyptic number.

It is an amenable number.

231031233 is a deficient number, since it is larger than the sum of its proper divisors (102680561).

231031233 is a wasteful number, since it uses less digits than its factorization.

231031233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25670143 (or 25670140 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231031233 is about 15199.7116091063. The cubic root of 231031233 is about 613.6068962849.

Adding to 231031233 its reverse (332130132), we get a palindrome (563161365).

It can be divided in two parts, 23103 and 1233, that added together give a square (24336 = 156²).

The spelling of 231031233 in words is "two hundred thirty-one million, thirty-one thousand, two hundred thirty-three".