231131012 has 24 divisors (see below), whose sum is σ = 466509120. Its totient is φ = 98146080.

The previous prime is 231130973. The next prime is 231131041. The reversal of 231131012 is 210131132.

231131012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34814 + ... + 40917.

It is an arithmetic number, because the mean of its divisors is an integer number (19437880).

Almost surely, 2^231131012 is an apocalyptic number.

It is an amenable number.

231131012 is an abundant number, since it is smaller than the sum of its proper divisors (235378108).

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

231131012 is a wasteful number, since it uses less digits than its factorization.

231131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75851 (or 75849 counting only the distinct ones).

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

The square root of 231131012 is about 15202.9935210142. The cubic root of 231131012 is about 613.6952195097.

Adding to 231131012 its reverse (210131132), we get a palindrome (441262144).

The spelling of 231131012 in words is "two hundred thirty-one million, one hundred thirty-one thousand, twelve".