231402772 has 12 divisors (see below), whose sum is σ = 406991200. Its totient is φ = 115119576.

The previous prime is 231402757. The next prime is 231402781. The reversal of 231402772 is 277204132.

It is a self number, because there is not a number n which added to its sum of digits gives 231402772.

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, 144558 + ... + 146149.

Almost surely, 2^231402772 is an apocalyptic number.

It is an amenable number.

231402772 is a deficient number, since it is larger than the sum of its proper divisors (175588428).

231402772 is a wasteful number, since it uses less digits than its factorization.

231402772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290910 (or 290908 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 231402772 is about 15211.9286088254. The cubic root of 231402772 is about 613.9356495140.

The spelling of 231402772 in words is "two hundred thirty-one million, four hundred two thousand, seven hundred seventy-two".