231388146 has 24 divisors (see below), whose sum is σ = 546917904. Its totient is φ = 70117560.

The previous prime is 231388093. The next prime is 231388153. The reversal of 231388146 is 641883132.

231388146 is a `hidden beast` number, since 231 + 388 + 1 + 46 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 231388146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 584116 + ... + 584511.

It is an arithmetic number, because the mean of its divisors is an integer number (22788246).

Almost surely, 2^231388146 is an apocalyptic number.

231388146 is an abundant number, since it is smaller than the sum of its proper divisors (315529758).

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

231388146 is a wasteful number, since it uses less digits than its factorization.

231388146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168646 (or 1168643 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 231388146 is about 15211.4478600822. The cubic root of 231388146 is about 613.9227144745.

The spelling of 231388146 in words is "two hundred thirty-one million, three hundred eighty-eight thousand, one hundred forty-six".