231000312 has 32 divisors (see below), whose sum is σ = 597416400. Its totient is φ = 74344704.

The previous prime is 231000311. The next prime is 231000317. The reversal of 231000312 is 213000132.

It is a happy number.

231000312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231000312² = 106722288288194688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231000311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165253 + ... + 166644.

Almost surely, 2^231000312 is an apocalyptic number.

It is an amenable number.

231000312 is an abundant number, since it is smaller than the sum of its proper divisors (366416088).

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

231000312 is a wasteful number, since it uses less digits than its factorization.

231000312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331935 (or 331931 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 231000312 is about 15198.6944176136. The cubic root of 231000312 is about 613.5795202095.

Adding to 231000312 its reverse (213000132), we get a palindrome (444000444).

The spelling of 231000312 in words is "two hundred thirty-one million, three hundred twelve", and thus it is an aban number.