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13195131 = 313931643
BaseRepresentation
bin110010010101…
…011101111011
3220211101022120
4302111131323
511334221011
61150452323
7220104525
oct62253573
926741276
1013195131
1174a2774
1245040a3
13296cc91
141a76a15
151259a06
hexc9577b

13195131 has 8 divisors (see below), whose sum is σ = 17720640. Its totient is φ = 8733192.

The previous prime is 13195103. The next prime is 13195163. The reversal of 13195131 is 13159131.

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

It is not a de Polignac number, because 13195131 - 26 = 13195067 is a prime.

It is a super-2 number, since 2×131951312 = 348222964214322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13195331) 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, 15405 + ... + 16238.

It is an arithmetic number, because the mean of its divisors is an integer number (2215080).

Almost surely, 213195131 is an apocalyptic number.

13195131 is a deficient number, since it is larger than the sum of its proper divisors (4525509).

13195131 is a wasteful number, since it uses less digits than its factorization.

13195131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31785.

The product of its digits is 405, while the sum is 24.

The square root of 13195131 is about 3632.5102890426. The cubic root of 13195131 is about 236.3040882849.

The spelling of 13195131 in words is "thirteen million, one hundred ninety-five thousand, one hundred thirty-one".

Divisors: 1 3 139 417 31643 94929 4398377 13195131