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2222180 = 225111109
BaseRepresentation
bin1000011110100001100100
311011220020222
420132201210
51032102210
6115343512
724613442
oct10364144
94156228
102222180
111288614
128b1b98
135ca5cc
1441bb92
152dd655
hex21e864

2222180 has 12 divisors (see below), whose sum is σ = 4666620. Its totient is φ = 888864.

The previous prime is 2222177. The next prime is 2222203. The reversal of 2222180 is 812222.

It can be written as a sum of positive squares in 2 ways, for example, as 1503076 + 719104 = 1226^2 + 848^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55535 + ... + 55574.

It is an arithmetic number, because the mean of its divisors is an integer number (388885).

22222180 is an apocalyptic number.

2222180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222180 is an abundant number, since it is smaller than the sum of its proper divisors (2444440).

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

2222180 is a wasteful number, since it uses less digits than its factorization.

2222180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111118 (or 111116 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2222180 is about 1490.6978231687. The cubic root of 2222180 is about 130.4947615617.

The spelling of 2222180 in words is "two million, two hundred twenty-two thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 111109 222218 444436 555545 1111090 2222180