231845478 has 32 divisors (see below), whose sum is σ = 477187584. Its totient is φ = 75040992.

The previous prime is 231845461. The next prime is 231845483. The reversal of 231845478 is 874548132.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174051 + ... + 175377.

It is an arithmetic number, because the mean of its divisors is an integer number (14912112).

Almost surely, 2^231845478 is an apocalyptic number.

231845478 is an abundant number, since it is smaller than the sum of its proper divisors (245342106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231845478 is a wasteful number, since it uses less digits than its factorization.

231845478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156.

The product of its digits is 215040, while the sum is 42.

The square root of 231845478 is about 15226.4729336771. The cubic root of 231845478 is about 614.3269151433.

The spelling of 231845478 in words is "two hundred thirty-one million, eight hundred forty-five thousand, four hundred seventy-eight".