232523021 has 2 divisors, whose sum is σ = 232523022. Its totient is φ = 232523020.

The previous prime is 232522999. The next prime is 232523023. The reversal of 232523021 is 120325232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177555625 + 54967396 = 13325^2 + 7414^2 .

It is a cyclic number.

It is not a de Polignac number, because 232523021 - 2¹⁰ = 232521997 is a prime.

Together with 232523023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 232522984 and 232523002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232523023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116261510 + 116261511.

It is an arithmetic number, because the mean of its divisors is an integer number (116261511).

Almost surely, 2^232523021 is an apocalyptic number.

It is an amenable number.

232523021 is a deficient number, since it is larger than the sum of its proper divisors (1).

232523021 is an equidigital number, since it uses as much as digits as its factorization.

232523021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 232523021 is about 15248.7055516198. The cubic root of 232523021 is about 614.9247674954.

Adding to 232523021 its reverse (120325232), we get a palindrome (352848253).

The spelling of 232523021 in words is "two hundred thirty-two million, five hundred twenty-three thousand, twenty-one".