232240021 has 16 divisors (see below), whose sum is σ = 263872000. Its totient is φ = 202627008.

The previous prime is 232240007. The next prime is 232240049. The reversal of 232240021 is 120042232.

It is a cyclic number.

It is not a de Polignac number, because 232240021 - 2²³ = 223851413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 232239977 and 232240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232240051) 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, 149155 + ... + 150703.

It is an arithmetic number, because the mean of its divisors is an integer number (16492000).

Almost surely, 2^232240021 is an apocalyptic number.

It is an amenable number.

232240021 is a deficient number, since it is larger than the sum of its proper divisors (31631979).

232240021 is a wasteful number, since it uses less digits than its factorization.

232240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 232240021 is about 15239.4232502415. The cubic root of 232240021 is about 614.6751945618.

Adding to 232240021 its reverse (120042232), we get a palindrome (352282253).

The spelling of 232240021 in words is "two hundred thirty-two million, two hundred forty thousand, twenty-one".