25522320 has 160 divisors (see below), whose sum is σ = 86601600. Its totient is φ = 6193152.

The previous prime is 25522313. The next prime is 25522369. The reversal of 25522320 is 2322552.

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, 132144 + ... + 132336.

It is an arithmetic number, because the mean of its divisors is an integer number (541260).

Almost surely, 2^25522320 is an apocalyptic number.

25522320 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 25522320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43300800).

25522320 is an abundant number, since it is smaller than the sum of its proper divisors (61079280).

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

25522320 is a wasteful number, since it uses less digits than its factorization.

25522320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25522320 is about 5051.9619951065. The cubic root of 25522320 is about 294.4241183179.

Adding to 25522320 its reverse (2322552), we get a palindrome (27844872).

The spelling of 25522320 in words is "twenty-five million, five hundred twenty-two thousand, three hundred twenty".