231085573 has 4 divisors (see below), whose sum is σ = 244678860. Its totient is φ = 217492288.

The previous prime is 231085571. The next prime is 231085579. The reversal of 231085573 is 375580132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131744484 + 99341089 = 11478^2 + 9967^2 .

It is not a de Polignac number, because 231085573 - 2¹ = 231085571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231085571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6796618 + ... + 6796651.

It is an arithmetic number, because the mean of its divisors is an integer number (61169715).

Almost surely, 2^231085573 is an apocalyptic number.

It is an amenable number.

231085573 is a deficient number, since it is larger than the sum of its proper divisors (13593287).

231085573 is a wasteful number, since it uses less digits than its factorization.

231085573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13593286.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 231085573 is about 15201.4990379239. The cubic root of 231085573 is about 613.6550005816.

The spelling of 231085573 in words is "two hundred thirty-one million, eighty-five thousand, five hundred seventy-three".