232116021 has 12 divisors (see below), whose sum is σ = 343076448. Its totient is φ = 151145064.

The previous prime is 232116019. The next prime is 232116077. The reversal of 232116021 is 120611232.

It is not a de Polignac number, because 232116021 - 2¹ = 232116019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 232115985 and 232116003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232156021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299505 + ... + 300278.

It is an arithmetic number, because the mean of its divisors is an integer number (28589704).

Almost surely, 2^232116021 is an apocalyptic number.

It is an amenable number.

232116021 is a deficient number, since it is larger than the sum of its proper divisors (110960427).

232116021 is a wasteful number, since it uses less digits than its factorization.

232116021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599832 (or 599829 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 232116021 is about 15235.3543116004. The cubic root of 232116021 is about 614.5657771680.

Adding to 232116021 its reverse (120611232), we get a palindrome (352727253).

The spelling of 232116021 in words is "two hundred thirty-two million, one hundred sixteen thousand, twenty-one".