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13130881 = 192923831
BaseRepresentation
bin110010000101…
…110010000001
3220201010011221
4302011302001
511330142011
61145235041
7216416311
oct62056201
926633157
1013130881
117459475
124492a81
13294996a
141a5b441
151245971
hexc85c81

13130881 has 8 divisors (see below), whose sum is σ = 14299200. Its totient is φ = 12010320.

The previous prime is 13130857. The next prime is 13130891. The reversal of 13130881 is 18803131.

13130881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13130881 - 211 = 13128833 is a prime.

It is a super-2 number, since 2×131308812 = 344840071672322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13130891) 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, 11365 + ... + 12466.

It is an arithmetic number, because the mean of its divisors is an integer number (1787400).

Almost surely, 213130881 is an apocalyptic number.

It is an amenable number.

13130881 is a deficient number, since it is larger than the sum of its proper divisors (1168319).

13130881 is a wasteful number, since it uses less digits than its factorization.

13130881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23879.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 13130881 is about 3623.6557507578. The cubic root of 13130881 is about 235.9199251941.

The spelling of 13130881 in words is "thirteen million, one hundred thirty thousand, eight hundred eighty-one".

Divisors: 1 19 29 551 23831 452789 691099 13130881