22022100 has 54 divisors (see below), whose sum is σ = 69029870. Its totient is φ = 5872320.

The previous prime is 22022093. The next prime is 22022101. The reversal of 22022100 is 122022.

It can be written as a sum of positive squares in 3 ways, for example, as 63504 + 21958596 = 252^2 + 4686^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11335 + ... + 13134.

Almost surely, 2^22022100 is an apocalyptic number.

22022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22022100 is an abundant number, since it is smaller than the sum of its proper divisors (47007770).

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

22022100 is a wasteful number, since it uses less digits than its factorization.

22022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24489 (or 24479 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22022100 is about 4692.7710363920. The cubic root of 22022100 is about 280.2977275280.

Adding to 22022100 its reverse (122022), we get a palindrome (22144122).

It can be divided in two parts, 22022 and 100, that added together give a palindrome (22122).

The spelling of 22022100 in words is "twenty-two million, twenty-two thousand, one hundred".