231011312 has 40 divisors (see below), whose sum is σ = 521189856. Its totient is φ = 97134336.

The previous prime is 231011311. The next prime is 231011321. The reversal of 231011312 is 213110132.

It is a super-2 number, since 2×231011312² = 106732452543922688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011311) 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, 13523 + ... + 25394.

Almost surely, 2^231011312 is an apocalyptic number.

It is an amenable number.

231011312 is an abundant number, since it is smaller than the sum of its proper divisors (290178544).

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

231011312 is a wasteful number, since it uses less digits than its factorization.

231011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38985 (or 38979 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 231011312 is about 15199.0562864936. The cubic root of 231011312 is about 613.5892593993.

Adding to 231011312 its reverse (213110132), we get a palindrome (444121444).

The spelling of 231011312 in words is "two hundred thirty-one million, eleven thousand, three hundred twelve".