222198100 has 18 divisors (see below), whose sum is σ = 482170094. Its totient is φ = 88879200.

The previous prime is 222198083. The next prime is 222198107. The reversal of 222198100 is 1891222.

It can be written as a sum of positive squares in 3 ways, for example, as 32970564 + 189227536 = 5742^2 + 13756^2 .

It is a super-2 number, since 2×222198100² = 98743991287220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222198107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110891 + ... + 1111090.

Almost surely, 2^222198100 is an apocalyptic number.

222198100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222198100 is an abundant number, since it is smaller than the sum of its proper divisors (259971994).

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

222198100 is a wasteful number, since it uses less digits than its factorization.

222198100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221995 (or 2221988 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 222198100 is about 14906.3107441110. The cubic root of 222198100 is about 605.6849469909.

The spelling of 222198100 in words is "two hundred twenty-two million, one hundred ninety-eight thousand, one hundred".