25221200 has 60 divisors (see below), whose sum is σ = 64175580. Its totient is φ = 9492480.

The previous prime is 25221199. The next prime is 25221211. The reversal of 25221200 is 212252.

It can be written as a sum of positive squares in 6 ways, for example, as 341056 + 24880144 = 584^2 + 4988^2 .

It is a super-2 number, since 2×25221200² = 1272217858880000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4946 + ... + 8654.

It is an arithmetic number, because the mean of its divisors is an integer number (1069593).

Almost surely, 2^25221200 is an apocalyptic number.

25221200 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 25221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32087790).

25221200 is an abundant number, since it is smaller than the sum of its proper divisors (38954380).

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

25221200 is a wasteful number, since it uses less digits than its factorization.

25221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3744 (or 3733 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 25221200 is about 5022.0712858342. The cubic root of 25221200 is about 293.2616330724.

Adding to 25221200 its reverse (212252), we get a palindrome (25433452).

The spelling of 25221200 in words is "twenty-five million, two hundred twenty-one thousand, two hundred".