321153641 has 2 divisors, whose sum is σ = 321153642. Its totient is φ = 321153640.

The previous prime is 321153631. The next prime is 321153649. The reversal of 321153641 is 146351123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236513641 + 84640000 = 15379^2 + 9200^2 .

It is an emirp because it is prime and its reverse (146351123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321153641 is a prime.

It is a super-2 number, since 2×321153641² = 206279322255113762, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321153641.

It is not a weakly prime, because it can be changed into another prime (321153649) 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, 160576820 + 160576821.

It is an arithmetic number, because the mean of its divisors is an integer number (160576821).

Almost surely, 2^321153641 is an apocalyptic number.

It is an amenable number.

321153641 is a deficient number, since it is larger than the sum of its proper divisors (1).

321153641 is an equidigital number, since it uses as much as digits as its factorization.

321153641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 321153641 is about 17920.7600564262. The cubic root of 321153641 is about 684.8113505405.

The spelling of 321153641 in words is "three hundred twenty-one million, one hundred fifty-three thousand, six hundred forty-one".