231311873 has 8 divisors (see below), whose sum is σ = 255181416. Its totient is φ = 208310400.

The previous prime is 231311813. The next prime is 231311881. The reversal of 231311873 is 378113132.

It can be written as a sum of positive squares in 4 ways, for example, as 2455489 + 228856384 = 1567^2 + 15128^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231311873 - 2²⁴ = 214534657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231311813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216458 + ... + 217523.

It is an arithmetic number, because the mean of its divisors is an integer number (31897677).

Almost surely, 2^231311873 is an apocalyptic number.

It is an amenable number.

231311873 is a deficient number, since it is larger than the sum of its proper divisors (23869543).

231311873 is a wasteful number, since it uses less digits than its factorization.

231311873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434035.

The product of its digits is 3024, while the sum is 29.

The square root of 231311873 is about 15208.9405613935. The cubic root of 231311873 is about 613.8552508151.

The spelling of 231311873 in words is "two hundred thirty-one million, three hundred eleven thousand, eight hundred seventy-three".