231660231 has 16 divisors (see below), whose sum is σ = 337858560. Its totient is φ = 140025920.

The previous prime is 231660223. The next prime is 231660259. The reversal of 231660231 is 132066132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231660231 - 2³ = 231660223 is a prime.

It is a super-2 number, since 2×231660231² = 107332925253946722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231660211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3475 + ... + 21803.

It is an arithmetic number, because the mean of its divisors is an integer number (21116160).

Almost surely, 2^231660231 is an apocalyptic number.

231660231 is a deficient number, since it is larger than the sum of its proper divisors (106198329).

231660231 is a wasteful number, since it uses less digits than its factorization.

231660231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18726.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 231660231 is about 15220.3886612662. The cubic root of 231660231 is about 614.1632536359.

The spelling of 231660231 in words is "two hundred thirty-one million, six hundred sixty thousand, two hundred thirty-one".