231385146 has 32 divisors (see below), whose sum is σ = 468877248. Its totient is φ = 76116480.

The previous prime is 231385127. The next prime is 231385157. The reversal of 231385146 is 641583132.

231385146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 226116 + ... + 227136.

It is an arithmetic number, because the mean of its divisors is an integer number (14652414).

Almost surely, 2^231385146 is an apocalyptic number.

231385146 is an abundant number, since it is smaller than the sum of its proper divisors (237492102).

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

231385146 is a wasteful number, since it uses less digits than its factorization.

231385146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486.

The product of its digits is 17280, while the sum is 33.

The square root of 231385146 is about 15211.3492498200. The cubic root of 231385146 is about 613.9200612471.

The spelling of 231385146 in words is "two hundred thirty-one million, three hundred eighty-five thousand, one hundred forty-six".