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2202001220 = 225110100061
BaseRepresentation
bin1000001100111111…
…1101111101000100
312200110110020210202
42003033331331010
514002203014340
61002300310032
7105365462426
oct20317757504
95613406722
102202001220
11a2aa77121
12515542318
13291282503
1416c63c816
15cd4b4c15
hex833fdf44

2202001220 has 12 divisors (see below), whose sum is σ = 4624202604. Its totient is φ = 880800480.

The previous prime is 2202001213. The next prime is 2202001223. The reversal of 2202001220 is 221002022.

It can be written as a sum of positive squares in 2 ways, for example, as 1691512384 + 510488836 = 41128^2 + 22594^2 .

It is not an unprimeable number, because it can be changed into a prime (2202001223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55050011 + ... + 55050050.

It is an arithmetic number, because the mean of its divisors is an integer number (385350217).

Almost surely, 22202001220 is an apocalyptic number.

2202001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2202001220 is an abundant number, since it is smaller than the sum of its proper divisors (2422201384).

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

2202001220 is a wasteful number, since it uses less digits than its factorization.

2202001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110100070 (or 110100068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2202001220 is about 46925.4858259347. The cubic root of 2202001220 is about 1300.9856863688.

Adding to 2202001220 its reverse (221002022), we get a palindrome (2423003242).

The spelling of 2202001220 in words is "two billion, two hundred two million, one thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 110100061 220200122 440400244 550500305 1101000610 2202001220