232213021 has 2 divisors, whose sum is σ = 232213022. Its totient is φ = 232213020.

The previous prime is 232213019. The next prime is 232213027. The reversal of 232213021 is 120312232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203376121 + 28836900 = 14261^2 + 5370^2 .

It is a cyclic number.

It is not a de Polignac number, because 232213021 - 2¹ = 232213019 is a prime.

Together with 232213019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 232212986 and 232213004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232213027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116106510 + 116106511.

It is an arithmetic number, because the mean of its divisors is an integer number (116106511).

Almost surely, 2^232213021 is an apocalyptic number.

It is an amenable number.

232213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

232213021 is an equidigital number, since it uses as much as digits as its factorization.

232213021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 232213021 is about 15238.5373641961. The cubic root of 232213021 is about 614.6513731243.

Adding to 232213021 its reverse (120312232), we get a palindrome (352525253).

The spelling of 232213021 in words is "two hundred thirty-two million, two hundred thirteen thousand, twenty-one".