231376321 has 12 divisors (see below), whose sum is σ = 255090276. Its totient is φ = 209707520.

The previous prime is 231376309. The next prime is 231376339. The reversal of 231376321 is 123673132.

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 180096400 = 7161^2 + 13420^2 .

It is not a de Polignac number, because 231376321 - 2⁷ = 231376193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231376321.

It is not an unprimeable number, because it can be changed into a prime (231376351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40005 + ... + 45421.

It is an arithmetic number, because the mean of its divisors is an integer number (21257523).

Almost surely, 2^231376321 is an apocalyptic number.

It is an amenable number.

231376321 is a deficient number, since it is larger than the sum of its proper divisors (23713955).

231376321 is a wasteful number, since it uses less digits than its factorization.

231376321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792 (or 5781 counting only the distinct ones).

The product of its digits is 4536, while the sum is 28.

The square root of 231376321 is about 15211.0591675925. The cubic root of 231376321 is about 613.9122562036.

The spelling of 231376321 in words is "two hundred thirty-one million, three hundred seventy-six thousand, three hundred twenty-one".