232400021 has 16 divisors (see below), whose sum is σ = 268450944. Its totient is φ = 197074944.

The previous prime is 232400017. The next prime is 232400029. The reversal of 232400021 is 120004232.

232400021 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 232400021 - 2² = 232400017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232399969 and 232400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232400029) 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, 402485 + ... + 403061.

It is an arithmetic number, because the mean of its divisors is an integer number (16778184).

Almost surely, 2^232400021 is an apocalyptic number.

It is an amenable number.

232400021 is a deficient number, since it is larger than the sum of its proper divisors (36050923).

232400021 is a wasteful number, since it uses less digits than its factorization.

232400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 232400021 is about 15244.6718888929. The cubic root of 232400021 is about 614.8163207610.

Adding to 232400021 its reverse (120004232), we get a palindrome (352404253).

The spelling of 232400021 in words is "two hundred thirty-two million, four hundred thousand, twenty-one".