25522240 has 28 divisors (see below), whose sum is σ = 60775596. Its totient is φ = 10208768.

The previous prime is 25522229. The next prime is 25522271. The reversal of 25522240 is 4222552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13075456 + 12446784 = 3616^2 + 3528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39559 + ... + 40198.

It is an arithmetic number, because the mean of its divisors is an integer number (2170557).

Almost surely, 2^25522240 is an apocalyptic number.

25522240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25522240 is an abundant number, since it is smaller than the sum of its proper divisors (35253356).

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

25522240 is an equidigital number, since it uses as much as digits as its factorization.

25522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79774 (or 79764 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25522240 is about 5051.9540773843. The cubic root of 25522240 is about 294.4238106923.

Adding to 25522240 its reverse (4222552), we get a palindrome (29744792).

The spelling of 25522240 in words is "twenty-five million, five hundred twenty-two thousand, two hundred forty".