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13213208 = 231986929
BaseRepresentation
bin110010011001…
…111000011000
3220212022010002
4302121320120
511340310313
61151112132
7220211321
oct62317030
926768102
1013213208
117505308
124512648
132978288
141a7d448
151260058
hexc99e18

13213208 has 16 divisors (see below), whose sum is σ = 26079000. Its totient is φ = 6258816.

The previous prime is 13213159. The next prime is 13213229. The reversal of 13213208 is 80231231.

It is a self number, because there is not a number n which added to its sum of digits gives 13213208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43313 + ... + 43616.

Almost surely, 213213208 is an apocalyptic number.

It is an amenable number.

13213208 is a deficient number, since it is larger than the sum of its proper divisors (12865792).

13213208 is a wasteful number, since it uses less digits than its factorization.

13213208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86954 (or 86950 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 13213208 is about 3634.9976616224. The cubic root of 13213208 is about 236.4119492778.

Adding to 13213208 its reverse (80231231), we get a palindrome (93444439).

The spelling of 13213208 in words is "thirteen million, two hundred thirteen thousand, two hundred eight".

Divisors: 1 2 4 8 19 38 76 152 86929 173858 347716 695432 1651651 3303302 6606604 13213208