22212400 has 60 divisors (see below), whose sum is σ = 60996592. Its totient is φ = 7614720.

The previous prime is 22212397. The next prime is 22212401. The reversal of 22212400 is 421222.

It is not an unprimeable number, because it can be changed into a prime (22212401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1167 + ... + 6766.

Almost surely, 2^22212400 is an apocalyptic number.

22212400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212400 is an abundant number, since it is smaller than the sum of its proper divisors (38784192).

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

22212400 is a wasteful number, since it uses less digits than its factorization.

22212400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7958 (or 7947 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22212400 is about 4713.0032887746. The cubic root of 22212400 is about 281.1027937476.

Adding to 22212400 its reverse (421222), we get a palindrome (22633622).

The spelling of 22212400 in words is "twenty-two million, two hundred twelve thousand, four hundred".