231120312 has 16 divisors (see below), whose sum is σ = 577800840. Its totient is φ = 77040096.

The previous prime is 231120293. The next prime is 231120341. The reversal of 231120312 is 213021132.

It is a junction number, because it is equal to n+sod(n) for n = 231120291 and 231120300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4814983 + ... + 4815030.

Almost surely, 2^231120312 is an apocalyptic number.

It is an amenable number.

231120312 is an abundant number, since it is smaller than the sum of its proper divisors (346680528).

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

231120312 is a wasteful number, since it uses less digits than its factorization.

231120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630022 (or 9630018 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231120312 is about 15202.6416125619. The cubic root of 231120312 is about 613.6857492095.

Adding to 231120312 its reverse (213021132), we get a palindrome (444141444).

The spelling of 231120312 in words is "two hundred thirty-one million, one hundred twenty thousand, three hundred twelve".