25520365 has 16 divisors (see below), whose sum is σ = 33164208. Its totient is φ = 18740736.

The previous prime is 25520353. The next prime is 25520381. The reversal of 25520365 is 56302552.

It can be written as a sum of positive squares in 8 ways, for example, as 779689 + 24740676 = 883^2 + 4974^2 .

It is a cyclic number.

It is not a de Polignac number, because 25520365 - 2⁵ = 25520333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11809 + ... + 13801.

It is an arithmetic number, because the mean of its divisors is an integer number (2072763).

Almost surely, 2^25520365 is an apocalyptic number.

It is an amenable number.

25520365 is a deficient number, since it is larger than the sum of its proper divisors (7643843).

25520365 is a wasteful number, since it uses less digits than its factorization.

25520365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 25520365 is about 5051.7685022178. The cubic root of 25520365 is about 294.4166005341.

The spelling of 25520365 in words is "twenty-five million, five hundred twenty thousand, three hundred sixty-five".