232543021 has 8 divisors (see below), whose sum is σ = 238452984. Its totient is φ = 226644480.

The previous prime is 232543019. The next prime is 232543043. The reversal of 232543021 is 120345232.

It can be written as a sum of positive squares in 4 ways, for example, as 56025225 + 176517796 = 7485^2 + 13286^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 232543021 - 2¹ = 232543019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232542983 and 232543001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232543321) 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, 50991 + ... + 55363.

It is an arithmetic number, because the mean of its divisors is an integer number (29806623).

Almost surely, 2^232543021 is an apocalyptic number.

It is an amenable number.

232543021 is a deficient number, since it is larger than the sum of its proper divisors (5909963).

232543021 is a wasteful number, since it uses less digits than its factorization.

232543021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 232543021 is about 15249.3613308886. The cubic root of 232543021 is about 614.9423974957.

Adding to 232543021 its reverse (120345232), we get a palindrome (352888253).

The spelling of 232543021 in words is "two hundred thirty-two million, five hundred forty-three thousand, twenty-one".