231573231 has 6 divisors (see below), whose sum is σ = 334494680. Its totient is φ = 154382148.

The previous prime is 231573211. The next prime is 231573233. The reversal of 231573231 is 132375132.

It is not a de Polignac number, because 231573231 - 2¹⁰ = 231572207 is a prime.

It is a super-2 number, since 2×231573231² = 107252322631558722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231573195 and 231573204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231573233) 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, 12865171 + ... + 12865188.

Almost surely, 2^231573231 is an apocalyptic number.

231573231 is a deficient number, since it is larger than the sum of its proper divisors (102921449).

231573231 is a wasteful number, since it uses less digits than its factorization.

231573231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25730365 (or 25730362 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 231573231 is about 15217.5303843955. The cubic root of 231573231 is about 614.0863610059.

The spelling of 231573231 in words is "two hundred thirty-one million, five hundred seventy-three thousand, two hundred thirty-one".