25055321 has 2 divisors, whose sum is σ = 25055322. Its totient is φ = 25055320.

The previous prime is 25055299. The next prime is 25055339. The reversal of 25055321 is 12355052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17547721 + 7507600 = 4189^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 25055321 - 2²² = 20861017 is a prime.

It is a super-2 number, since 2×25055321² = 1255538220826082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25055341) 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, 12527660 + 12527661.

It is an arithmetic number, because the mean of its divisors is an integer number (12527661).

Almost surely, 2^25055321 is an apocalyptic number.

It is an amenable number.

25055321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25055321 is an equidigital number, since it uses as much as digits as its factorization.

25055321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 25055321 is about 5005.5290429684. The cubic root of 25055321 is about 292.6172943756.

The spelling of 25055321 in words is "twenty-five million, fifty-five thousand, three hundred twenty-one".