231228320 has 24 divisors (see below), whose sum is σ = 546277284. Its totient is φ = 92491264.

The previous prime is 231228317. The next prime is 231228331. The reversal of 231228320 is 23822132.

It can be written as a sum of positive squares in 2 ways, for example, as 229946896 + 1281424 = 15164^2 + 1132^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722429 + ... + 722748.

Almost surely, 2^231228320 is an apocalyptic number.

231228320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231228320 is an abundant number, since it is smaller than the sum of its proper divisors (315048964).

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

231228320 is a wasteful number, since it uses less digits than its factorization.

231228320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445192 (or 1445184 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 231228320 is about 15206.1934750285. The cubic root of 231228320 is about 613.7813309541.

The spelling of 231228320 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, three hundred twenty".