25206220 has 48 divisors (see below), whose sum is σ = 58988160. Its totient is φ = 8983296.

The previous prime is 25206197. The next prime is 25206277. The reversal of 25206220 is 2260252.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5869 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (1228920).

Almost surely, 2^25206220 is an apocalyptic number.

25206220 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 25206220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29494080).

25206220 is an abundant number, since it is smaller than the sum of its proper divisors (33781940).

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

25206220 is a wasteful number, since it uses less digits than its factorization.

25206220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 25206220 is about 5020.5796478096. The cubic root of 25206220 is about 293.2035611687.

Adding to 25206220 its reverse (2260252), we get a palindrome (27466472).

The spelling of 25206220 in words is "twenty-five million, two hundred six thousand, two hundred twenty".