232320021 has 8 divisors (see below), whose sum is σ = 314383584. Its totient is φ = 152568240.

The previous prime is 232320019. The next prime is 232320031. The reversal of 232320021 is 120023232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 232320021 - 2¹ = 232320019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232320001) 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, 577710 + ... + 578111.

It is an arithmetic number, because the mean of its divisors is an integer number (39297948).

Almost surely, 2^232320021 is an apocalyptic number.

It is an amenable number.

232320021 is a deficient number, since it is larger than the sum of its proper divisors (82063563).

232320021 is a wasteful number, since it uses less digits than its factorization.

232320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155891.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 232320021 is about 15242.0477954899. The cubic root of 232320021 is about 614.7457657609.

Adding to 232320021 its reverse (120023232), we get a palindrome (352343253).

The spelling of 232320021 in words is "two hundred thirty-two million, three hundred twenty thousand, twenty-one".