232521997 has 2 divisors, whose sum is σ = 232521998. Its totient is φ = 232521996.

The previous prime is 232521983. The next prime is 232522067. The reversal of 232521997 is 799125232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141395881 + 91126116 = 11891^2 + 9546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232521997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232521967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116260998 + 116260999.

It is an arithmetic number, because the mean of its divisors is an integer number (116260999).

Almost surely, 2^232521997 is an apocalyptic number.

It is an amenable number.

232521997 is a deficient number, since it is larger than the sum of its proper divisors (1).

232521997 is an equidigital number, since it uses as much as digits as its factorization.

232521997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 232521997 is about 15248.6719749623. The cubic root of 232521997 is about 614.9238648122.

The spelling of 232521997 in words is "two hundred thirty-two million, five hundred twenty-one thousand, nine hundred ninety-seven".