231066312 has 64 divisors (see below), whose sum is σ = 631411200. Its totient is φ = 70149120.

The previous prime is 231066301. The next prime is 231066323. The reversal of 231066312 is 213660132.

It is a happy number.

231066312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231066301) and next prime (231066323).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3514 + ... + 21782.

It is an arithmetic number, because the mean of its divisors is an integer number (9865800).

Almost surely, 2^231066312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231066312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315705600).

231066312 is an abundant number, since it is smaller than the sum of its proper divisors (400344888).

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

231066312 is a wasteful number, since it uses less digits than its factorization.

231066312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18326 (or 18322 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 231066312 is about 15200.8655016746. The cubic root of 231066312 is about 613.6379507109.

The spelling of 231066312 in words is "two hundred thirty-one million, sixty-six thousand, three hundred twelve".