231123512 has 8 divisors (see below), whose sum is σ = 433356600. Its totient is φ = 115561752.

The previous prime is 231123511. The next prime is 231123523. The reversal of 231123512 is 215321132.

231123512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231123511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445212 + ... + 14445227.

It is an arithmetic number, because the mean of its divisors is an integer number (54169575).

Almost surely, 2^231123512 is an apocalyptic number.

It is an amenable number.

231123512 is a deficient number, since it is larger than the sum of its proper divisors (202233088).

231123512 is a wasteful number, since it uses less digits than its factorization.

231123512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28890445 (or 28890441 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 231123512 is about 15202.7468570650. The cubic root of 231123512 is about 613.6885814795.

Adding to 231123512 its reverse (215321132), we get a palindrome (446444644).

The spelling of 231123512 in words is "two hundred thirty-one million, one hundred twenty-three thousand, five hundred twelve".