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13213151 = 71999347
BaseRepresentation
bin110010011001…
…110111011111
3220212022000222
4302121313133
511340310101
61151111555
7220211210
oct62316737
926768028
1013213151
117505266
1245125bb
132978243
141a7d407
15126001b
hexc99ddf

13213151 has 8 divisors (see below), whose sum is σ = 15895680. Its totient is φ = 10729368.

The previous prime is 13213139. The next prime is 13213153. The reversal of 13213151 is 15131231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13213151 - 26 = 13213087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49541 + ... + 49806.

It is an arithmetic number, because the mean of its divisors is an integer number (1986960).

Almost surely, 213213151 is an apocalyptic number.

13213151 is a deficient number, since it is larger than the sum of its proper divisors (2682529).

13213151 is an equidigital number, since it uses as much as digits as its factorization.

13213151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99373.

The product of its digits is 90, while the sum is 17.

The square root of 13213151 is about 3634.9898211687. The cubic root of 13213151 is about 236.4116093275.

Adding to 13213151 its reverse (15131231), we get a palindrome (28344382).

The spelling of 13213151 in words is "thirteen million, two hundred thirteen thousand, one hundred fifty-one".

Divisors: 1 7 19 133 99347 695429 1887593 13213151