25560220 has 96 divisors (see below), whose sum is σ = 64745856. Its totient is φ = 8294400.

The previous prime is 25560217. The next prime is 25560233. The reversal of 25560220 is 2206552.

It is a junction number, because it is equal to n+sod(n) for n = 25560191 and 25560200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350104 + ... + 350176.

It is an arithmetic number, because the mean of its divisors is an integer number (674436).

Almost surely, 2^25560220 is an apocalyptic number.

25560220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25560220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32372928).

25560220 is an abundant number, since it is smaller than the sum of its proper divisors (39185636).

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

25560220 is a wasteful number, since it uses less digits than its factorization.

25560220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 25560220 is about 5055.7116215227. The cubic root of 25560220 is about 294.5697836961.

Adding to 25560220 its reverse (2206552), we get a palindrome (27766772).

The spelling of 25560220 in words is "twenty-five million, five hundred sixty thousand, two hundred twenty".