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201222220 = 22510061111
BaseRepresentation
bin10111111111001…
…10100001001100
3112000122010222211
423333212201030
5403003102340
631544520204
74662234463
oct1377464114
9460563884
10201222220
11a3648261
1257480064
13328c4704
141ca1d9da
15129eb5ea
hexbfe684c

201222220 has 12 divisors (see below), whose sum is σ = 422566704. Its totient is φ = 80488880.

The previous prime is 201222211. The next prime is 201222223. The reversal of 201222220 is 22222102.

It is a self number, because there is not a number n which added to its sum of digits gives 201222220.

It is not an unprimeable number, because it can be changed into a prime (201222223) 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, 5030536 + ... + 5030575.

It is an arithmetic number, because the mean of its divisors is an integer number (35213892).

Almost surely, 2201222220 is an apocalyptic number.

201222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201222220 is an abundant number, since it is smaller than the sum of its proper divisors (221344484).

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

201222220 is a wasteful number, since it uses less digits than its factorization.

201222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061120 (or 10061118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 201222220 is about 14185.2818089737. The cubic root of 201222220 is about 585.9923935226.

Adding to 201222220 its reverse (22222102), we get a palindrome (223444322).

The spelling of 201222220 in words is "two hundred one million, two hundred twenty-two thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 10061111 20122222 40244444 50305555 100611110 201222220