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13162013 = 17376081
BaseRepresentation
bin110010001101…
…011000011101
3220202200212222
4302031120131
511332141023
61150035125
7216606134
oct62153035
926680788
1013162013
11747a8a7
1244a8aa5
13295ab97
141a6891b
15124ecc8
hexc8d61d

13162013 has 4 divisors (see below), whose sum is σ = 13238268. Its totient is φ = 13085760.

The previous prime is 13161991. The next prime is 13162043. The reversal of 13162013 is 31026131.

13162013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31026131 = 194915919.

It can be written as a sum of positive squares in 2 ways, for example, as 5555449 + 7606564 = 2357^2 + 2758^2 .

It is a cyclic number.

It is not a de Polignac number, because 13162013 - 210 = 13160989 is a prime.

It is a super-4 number, since 4×131620134 (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13161982 and 13162000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13162043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37868 + ... + 38213.

It is an arithmetic number, because the mean of its divisors is an integer number (3309567).

Almost surely, 213162013 is an apocalyptic number.

It is an amenable number.

13162013 is a deficient number, since it is larger than the sum of its proper divisors (76255).

13162013 is an equidigital number, since it uses as much as digits as its factorization.

13162013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76254.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 13162013 is about 3627.9488695405. The cubic root of 13162013 is about 236.1062255208.

Adding to 13162013 its reverse (31026131), we get a palindrome (44188144).

The spelling of 13162013 in words is "thirteen million, one hundred sixty-two thousand, thirteen".

Divisors: 1 173 76081 13162013