231523230 has 32 divisors (see below), whose sum is σ = 556623648. Its totient is φ = 61632000.

The previous prime is 231523217. The next prime is 231523247. The reversal of 231523230 is 32325132.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231523197 and 231523206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11610 + ... + 24450.

It is an arithmetic number, because the mean of its divisors is an integer number (17394489).

Almost surely, 2^231523230 is an apocalyptic number.

231523230 is an abundant number, since it is smaller than the sum of its proper divisors (325100418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231523230 is a wasteful number, since it uses less digits than its factorization.

231523230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13452.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 231523230 is about 15215.8874207192. The cubic root of 231523230 is about 614.0421602402.

Adding to 231523230 its reverse (32325132), we get a palindrome (263848362).

The spelling of 231523230 in words is "two hundred thirty-one million, five hundred twenty-three thousand, two hundred thirty".