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12000222 = 2321351283
BaseRepresentation
bin101101110001…
…101111011110
3211120200012200
4231301233132
511033001342
61105112330
7204000033
oct55615736
924520180
1012000222
116856a43
1240286a6
132642130
14184538a
1510c094c
hexb71bde

12000222 has 24 divisors (see below), whose sum is σ = 28001064. Its totient is φ = 3692304.

The previous prime is 12000133. The next prime is 12000239. The reversal of 12000222 is 22200021.

It is a Harshad number since it is a multiple of its sum of digits (9).

12000222 is a modest number, since divided by 222 gives 12 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25408 + ... + 25875.

It is an arithmetic number, because the mean of its divisors is an integer number (1166711).

Almost surely, 212000222 is an apocalyptic number.

12000222 is an abundant number, since it is smaller than the sum of its proper divisors (16000842).

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

12000222 is a wasteful number, since it uses less digits than its factorization.

12000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51304 (or 51301 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 12000222 is about 3464.1336579295. The cubic root of 12000222 is about 228.9442603162.

Adding to 12000222 its reverse (22200021), we get a palindrome (34200243).

The spelling of 12000222 in words is "twelve million, two hundred twenty-two", and thus it is an aban number.

Divisors: 1 2 3 6 9 13 18 26 39 78 117 234 51283 102566 153849 307698 461547 666679 923094 1333358 2000037 4000074 6000111 12000222