231031983 has 16 divisors (see below), whose sum is σ = 379129856. Its totient is φ = 121862880.

The previous prime is 231031973. The next prime is 231032017. The reversal of 231031983 is 389130132.

It is not a de Polignac number, because 231031983 - 2⁶ = 231031919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231031983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231031943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422863 + ... + 423408.

It is an arithmetic number, because the mean of its divisors is an integer number (23695616).

Almost surely, 2^231031983 is an apocalyptic number.

231031983 is a deficient number, since it is larger than the sum of its proper divisors (148097873).

231031983 is a wasteful number, since it uses less digits than its factorization.

231031983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846294.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 231031983 is about 15199.7362806070. The cubic root of 231031983 is about 613.6075602712.

The spelling of 231031983 in words is "two hundred thirty-one million, thirty-one thousand, nine hundred eighty-three".