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222100 = 22522221
BaseRepresentation
bin110110001110010100
3102021122221
4312032110
524101400
64432124
71613344
oct661624
9367587
10222100
1114195a
12a8644
137a128
145ad24
1545c1a
hex36394

222100 has 18 divisors (see below), whose sum is σ = 482174. Its totient is φ = 88800.

The previous prime is 222073. The next prime is 222107. The reversal of 222100 is 1222.

It is a happy number.

222100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 24964 + 197136 = 158^2 + 444^2 .

It is a nialpdrome in base 10 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222107) 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, 1011 + ... + 1210.

2222100 is an apocalyptic number.

222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222100 is an abundant number, since it is smaller than the sum of its proper divisors (260074).

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

222100 is a wasteful number, since it uses less digits than its factorization.

222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 222100 is about 471.2748667179. The cubic root of 222100 is about 60.5595797654.

Adding to 222100 its reverse (1222), we get a palindrome (223322).

The spelling of 222100 in words is "two hundred twenty-two thousand, one hundred", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 25 50 100 2221 4442 8884 11105 22210 44420 55525 111050 222100