231837205473 has 12 divisors (see below), whose sum is σ = 336018888660. Its totient is φ = 154030633056.

The previous prime is 231837205447. The next prime is 231837205511. The reversal of 231837205473 is 374502738132.

It is a happy number.

231837205473 is a `hidden beast` number, since 2 + 3 + 1 + 83 + 7 + 20 + 547 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 197911986129 + 33925219344 = 444873^2 + 184188^2 .

It is not a de Polignac number, because 231837205473 - 2²⁰ = 231836156897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231837205403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43955878 + ... + 43961151.

It is an arithmetic number, because the mean of its divisors is an integer number (28001574055).

Almost surely, 2^231837205473 is an apocalyptic number.

It is an amenable number.

231837205473 is a deficient number, since it is larger than the sum of its proper divisors (104181683187).

231837205473 is a wasteful number, since it uses less digits than its factorization.

231837205473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87917328 (or 87917325 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 231837205473 in words is "two hundred thirty-one billion, eight hundred thirty-seven million, two hundred five thousand, four hundred seventy-three".