231301128 has 32 divisors (see below), whose sum is σ = 591703200. Its totient is φ = 75307008.

The previous prime is 231301127. The next prime is 231301139. The reversal of 231301128 is 821103132.

It is not an unprimeable number, because it can be changed into a prime (231301123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111033 + ... + 113096.

It is an arithmetic number, because the mean of its divisors is an integer number (18490725).

Almost surely, 2^231301128 is an apocalyptic number.

It is an amenable number.

231301128 is an abundant number, since it is smaller than the sum of its proper divisors (360402072).

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

231301128 is a wasteful number, since it uses less digits than its factorization.

231301128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224181 (or 224177 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 231301128 is about 15208.5873111213. The cubic root of 231301128 is about 613.8457456440.

The spelling of 231301128 in words is "two hundred thirty-one million, three hundred one thousand, one hundred twenty-eight".