231391146 has 16 divisors (see below), whose sum is σ = 528894144. Its totient is φ = 66111744.

The previous prime is 231391129. The next prime is 231391151. The reversal of 231391146 is 641193132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2754615 + ... + 2754698.

It is an arithmetic number, because the mean of its divisors is an integer number (33055884).

Almost surely, 2^231391146 is an apocalyptic number.

231391146 is an abundant number, since it is smaller than the sum of its proper divisors (297502998).

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

231391146 is a wasteful number, since it uses less digits than its factorization.

231391146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509325.

The product of its digits is 3888, while the sum is 30.

The square root of 231391146 is about 15211.5464697052. The cubic root of 231391146 is about 613.9253676790.

The spelling of 231391146 in words is "two hundred thirty-one million, three hundred ninety-one thousand, one hundred forty-six".