53365321 has 2 divisors, whose sum is σ = 53365322. Its totient is φ = 53365320.

The previous prime is 53365289. The next prime is 53365337. The reversal of 53365321 is 12356335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 657721 = 7260^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 53365321 - 2⁵ = 53365289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53365321.

It is not a weakly prime, because it can be changed into another prime (53365381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26682660 + 26682661.

It is an arithmetic number, because the mean of its divisors is an integer number (26682661).

Almost surely, 2^53365321 is an apocalyptic number.

It is an amenable number.

53365321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53365321 is an equidigital number, since it uses as much as digits as its factorization.

53365321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 28.

The square root of 53365321 is about 7305.1571509448. The cubic root of 53365321 is about 376.4896503795.

The spelling of 53365321 in words is "fifty-three million, three hundred sixty-five thousand, three hundred twenty-one".