230665621 has 2 divisors, whose sum is σ = 230665622. Its totient is φ = 230665620.

The previous prime is 230665607. The next prime is 230665649. The reversal of 230665621 is 126566032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179184996 + 51480625 = 13386^2 + 7175^2 .

It is a cyclic number.

It is not a de Polignac number, because 230665621 - 2⁷ = 230665493 is a prime.

It is a super-2 number, since 2×230665621² = 106413257422631282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230665601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115332810 + 115332811.

It is an arithmetic number, because the mean of its divisors is an integer number (115332811).

Almost surely, 2^230665621 is an apocalyptic number.

It is an amenable number.

230665621 is a deficient number, since it is larger than the sum of its proper divisors (1).

230665621 is an equidigital number, since it uses as much as digits as its factorization.

230665621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 230665621 is about 15187.6799083994. The cubic root of 230665621 is about 613.2830432603.

The spelling of 230665621 in words is "two hundred thirty million, six hundred sixty-five thousand, six hundred twenty-one".