22205100 has 36 divisors (see below), whose sum is σ = 64247624. Its totient is φ = 5921280.

The previous prime is 22205093. The next prime is 22205101. The reversal of 22205100 is 150222.

22205100 = T₃₂₇ + T₃₂₈ + ... + T₅₅₁.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22205101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36709 + ... + 37308.

Almost surely, 2^22205100 is an apocalyptic number.

22205100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22205100 is an abundant number, since it is smaller than the sum of its proper divisors (42042524).

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

22205100 is a wasteful number, since it uses less digits than its factorization.

22205100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74034 (or 74027 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 22205100 is about 4712.2287720356. The cubic root of 22205100 is about 281.0719960065.

Adding to 22205100 its reverse (150222), we get a palindrome (22355322).

The spelling of 22205100 in words is "twenty-two million, two hundred five thousand, one hundred".