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13201251 = 371494219
BaseRepresentation
bin110010010110…
…111101100011
3220211200201020
4302112331203
511334420001
61150540523
7220131420
oct62267543
926750636
1013201251
1174a7328
124507743
1329729bb
141a78d47
15125b736
hexc96f63

13201251 has 16 divisors (see below), whose sum is σ = 20256000. Its totient is φ = 7491168.

The previous prime is 13201249. The next prime is 13201259. The reversal of 13201251 is 15210231.

It is not a de Polignac number, because 13201251 - 21 = 13201249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13201251.

It is not an unprimeable number, because it can be changed into a prime (13201259) 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, 1020 + ... + 5238.

It is an arithmetic number, because the mean of its divisors is an integer number (1266000).

Almost surely, 213201251 is an apocalyptic number.

13201251 is a deficient number, since it is larger than the sum of its proper divisors (7054749).

13201251 is a wasteful number, since it uses less digits than its factorization.

13201251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 13201251 is about 3633.3525840469. The cubic root of 13201251 is about 236.3406158367.

Adding to 13201251 its reverse (15210231), we get a palindrome (28411482).

The spelling of 13201251 in words is "thirteen million, two hundred one thousand, two hundred fifty-one".

Divisors: 1 3 7 21 149 447 1043 3129 4219 12657 29533 88599 628631 1885893 4400417 13201251