231775616 has 16 divisors (see below), whose sum is σ = 461740740. Its totient is φ = 115887744.

The previous prime is 231775613. The next prime is 231775619. The reversal of 231775616 is 616577132.

It is an interprime number because it is at equal distance from previous prime (231775613) and next prime (231775619).

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 231775616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231775613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905246 + ... + 905501.

Almost surely, 2^231775616 is an apocalyptic number.

It is an amenable number.

231775616 is a deficient number, since it is larger than the sum of its proper divisors (229965124).

231775616 is an equidigital number, since it uses as much as digits as its factorization.

231775616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810761 (or 1810749 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 231775616 is about 15224.1786642170. The cubic root of 231775616 is about 614.2652038994.

The spelling of 231775616 in words is "two hundred thirty-one million, seven hundred seventy-five thousand, six hundred sixteen".