231249983 has 2 divisors, whose sum is σ = 231249984. Its totient is φ = 231249982.

The previous prime is 231249979. The next prime is 231249989. The reversal of 231249983 is 389942132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231249983 - 2² = 231249979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231249983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231249989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115624991 + 115624992.

It is an arithmetic number, because the mean of its divisors is an integer number (115624992).

Almost surely, 2^231249983 is an apocalyptic number.

231249983 is a deficient number, since it is larger than the sum of its proper divisors (1).

231249983 is an equidigital number, since it uses as much as digits as its factorization.

231249983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 231249983 is about 15206.9057667890. The cubic root of 231249983 is about 613.8004980552.

It can be divided in two parts, 231249 and 983, that added together give a palindrome (232232).

The spelling of 231249983 in words is "two hundred thirty-one million, two hundred forty-nine thousand, nine hundred eighty-three".