25222212100 has 36 divisors (see below), whose sum is σ = 54767870500. Its totient is φ = 10082309760.

The previous prime is 25222212097. The next prime is 25222212143. The reversal of 25222212100 is 121222252.

It can be written as a sum of positive squares in 6 ways, for example, as 167754304 + 25054457796 = 12952^2 + 158286^2 .

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, 73486 + ... + 236314.

Almost surely, 2^25222212100 is an apocalyptic number.

25222212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25222212100 is an abundant number, since it is smaller than the sum of its proper divisors (29545658400).

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

25222212100 is a wasteful number, since it uses less digits than its factorization.

25222212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164392 (or 164385 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 25222212100 its reverse (121222252), we get a palindrome (25343434352).

The spelling of 25222212100 in words is "twenty-five billion, two hundred twenty-two million, two hundred twelve thousand, one hundred".