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13120131 = 318232399
BaseRepresentation
bin110010000011…
…001010000011
3220200120102210
4302003022003
511324321011
61145113203
7216343053
oct62031203
926616383
1013120131
117451392
124488803
132944abb
141a57563
1512426a6
hexc83283

13120131 has 8 divisors (see below), whose sum is σ = 17510400. Its totient is φ = 8738312.

The previous prime is 13120111. The next prime is 13120139. The reversal of 13120131 is 13102131.

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 13120131 - 26 = 13120067 is a prime.

It is a super-2 number, since 2×131201312 = 344275674914322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13120139) 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, 4270 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (2188800).

Almost surely, 213120131 is an apocalyptic number.

13120131 is a deficient number, since it is larger than the sum of its proper divisors (4390269).

13120131 is a wasteful number, since it uses less digits than its factorization.

13120131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 13120131 is about 3622.1721383722. The cubic root of 13120131 is about 235.8555265802.

Adding to 13120131 its reverse (13102131), we get a palindrome (26222262).

The spelling of 13120131 in words is "thirteen million, one hundred twenty thousand, one hundred thirty-one".

Divisors: 1 3 1823 2399 5469 7197 4373377 13120131