25221332700 has 216 divisors, whose sum is σ = 81212302080. Its totient is φ = 6543849600.

The previous prime is 25221332681. The next prime is 25221332701. The reversal of 25221332700 is 723312252.

It is a happy number.

25221332700 is a `hidden beast` number, since 2 + 522 + 133 + 2 + 7 + 0 + 0 = 666.

It is a super-2 number, since 2×25221332700² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221332701) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7570035 + ... + 7573365.

It is an arithmetic number, because the mean of its divisors is an integer number (375982880).

Almost surely, 2^25221332700 is an apocalyptic number.

25221332700 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 25221332700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40606151040).

25221332700 is an abundant number, since it is smaller than the sum of its proper divisors (55990969380).

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

25221332700 is a wasteful number, since it uses less digits than its factorization.

25221332700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577 (or 3567 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

Adding to 25221332700 its reverse (723312252), we get a palindrome (25944644952).

The spelling of 25221332700 in words is "twenty-five billion, two hundred twenty-one million, three hundred thirty-two thousand, seven hundred".