25364221 has 12 divisors (see below), whose sum is σ = 28350972. Its totient is φ = 22610304.

The previous prime is 25364197. The next prime is 25364233. The reversal of 25364221 is 12246352.

It can be written as a sum of positive squares in 2 ways, for example, as 19263321 + 6100900 = 4389^2 + 2470^2 .

It is not a de Polignac number, because 25364221 - 2⁵ = 25364189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25364291) 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 in 11 ways as a sum of consecutive naturals, for example, 4071 + ... + 8203.

It is an arithmetic number, because the mean of its divisors is an integer number (2362581).

Almost surely, 2^25364221 is an apocalyptic number.

It is an amenable number.

25364221 is a deficient number, since it is larger than the sum of its proper divisors (2986751).

25364221 is a wasteful number, since it uses less digits than its factorization.

25364221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188 (or 4169 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 25364221 is about 5036.2904006818. The cubic root of 25364221 is about 293.8149181405.

The spelling of 25364221 in words is "twenty-five million, three hundred sixty-four thousand, two hundred twenty-one".