25536220 has 24 divisors (see below), whose sum is σ = 54183024. Its totient is φ = 10108416.

The previous prime is 25536163. The next prime is 25536229. The reversal of 25536220 is 2263552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25536229) 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 7 ways as a sum of consecutive naturals, for example, 4642 + ... + 8521.

It is an arithmetic number, because the mean of its divisors is an integer number (2257626).

Almost surely, 2^25536220 is an apocalyptic number.

25536220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25536220 is an abundant number, since it is smaller than the sum of its proper divisors (28646804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25536220 is a wasteful number, since it uses less digits than its factorization.

25536220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13269 (or 13267 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 25536220 is about 5053.3375109921. The cubic root of 25536220 is about 294.4775585030.

Adding to 25536220 its reverse (2263552), we get a palindrome (27799772).

The spelling of 25536220 in words is "twenty-five million, five hundred thirty-six thousand, two hundred twenty".