22551900 has 72 divisors (see below), whose sum is σ = 74578560. Its totient is φ = 5154240.

The previous prime is 22551899. The next prime is 22551929. The reversal of 22551900 is 915522.

It is a super-2 number, since 2×22551900² = 1017176387220000, 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 23 ways as a sum of consecutive naturals, for example, 3270 + ... + 7469.

Almost surely, 2^22551900 is an apocalyptic number.

22551900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22551900 is an abundant number, since it is smaller than the sum of its proper divisors (52026660).

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

22551900 is a wasteful number, since it uses less digits than its factorization.

22551900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10763 (or 10756 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 22551900 is about 4748.8840794443. The cubic root of 22551900 is about 282.5277076225.

It can be divided in two parts, 225 and 51900, that added together give a palindrome (52125).

The spelling of 22551900 in words is "twenty-two million, five hundred fifty-one thousand, nine hundred".