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12207213 = 334311049
BaseRepresentation
bin101110100100…
…010001101101
3211222012011000
4232210101231
511111112323
61113350513
7205521354
oct56442155
924865130
1012207213
116988507
124108439
1326b5405
14189a99b
151111e43
hexba446d

12207213 has 16 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 8111520.

The previous prime is 12207203. The next prime is 12207229. The reversal of 12207213 is 31270221.

12207213 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12207213 - 24 = 12207197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12207203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11113 + ... + 12161.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 212207213 is an apocalyptic number.

It is an amenable number.

12207213 is a deficient number, since it is larger than the sum of its proper divisors (5936787).

12207213 is a wasteful number, since it uses less digits than its factorization.

12207213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12207213 is about 3493.8822246893. The cubic root of 12207213 is about 230.2531113968.

Adding to 12207213 its reverse (31270221), we get a palindrome (43477434).

The spelling of 12207213 in words is "twelve million, two hundred seven thousand, two hundred thirteen".

Divisors: 1 3 9 27 431 1049 1293 3147 3879 9441 11637 28323 452119 1356357 4069071 12207213