231056321 has 16 divisors (see below), whose sum is σ = 255037440. Its totient is φ = 208351440.

The previous prime is 231056317. The next prime is 231056323. The reversal of 231056321 is 123650132.

231056321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 231056321 - 2² = 231056317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231056323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96266 + ... + 98636.

It is an arithmetic number, because the mean of its divisors is an integer number (15939840).

Almost surely, 2^231056321 is an apocalyptic number.

It is an amenable number.

231056321 is a deficient number, since it is larger than the sum of its proper divisors (23981119).

231056321 is a wasteful number, since it uses less digits than its factorization.

231056321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 231056321 is about 15200.5368655189. The cubic root of 231056321 is about 613.6291062872.

The spelling of 231056321 in words is "two hundred thirty-one million, fifty-six thousand, three hundred twenty-one".