25422100 has 72 divisors (see below), whose sum is σ = 60996096. Its totient is φ = 9196000.

The previous prime is 25422053. The next prime is 25422109. The reversal of 25422100 is 122452.

25422100 is nontrivially palindromic in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25422109) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 133005 + ... + 133195.

It is an arithmetic number, because the mean of its divisors is an integer number (847168).

Almost surely, 2^25422100 is an apocalyptic number.

25422100 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 25422100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30498048).

25422100 is an abundant number, since it is smaller than the sum of its proper divisors (35573996).

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

25422100 is a wasteful number, since it uses less digits than its factorization.

25422100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 25422100 is about 5042.0333200010. The cubic root of 25422100 is about 294.0382352666.

Adding to 25422100 its reverse (122452), we get a palindrome (25544552).

The spelling of 25422100 in words is "twenty-five million, four hundred twenty-two thousand, one hundred".