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13918855 = 52783771
BaseRepresentation
bin110101000110…
…001010000111
3222012011002011
4311012022013
512030400410
61214155051
7226210516
oct65061207
928164064
1013918855
117947495
1247b2a87
132b64512
141bc467d
15134e18a
hexd46287

13918855 has 4 divisors (see below), whose sum is σ = 16702632. Its totient is φ = 11135080.

The previous prime is 13918843. The next prime is 13918871. The reversal of 13918855 is 55881931.

13918855 is digitally balanced in base 3, 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: 55881931 = 77983133.

It is not a de Polignac number, because 13918855 - 25 = 13918823 is a prime.

It is a super-2 number, since 2×139188552 = 387469049022050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391881 + ... + 1391890.

It is an arithmetic number, because the mean of its divisors is an integer number (4175658).

Almost surely, 213918855 is an apocalyptic number.

13918855 is a deficient number, since it is larger than the sum of its proper divisors (2783777).

13918855 is an equidigital number, since it uses as much as digits as its factorization.

13918855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783776.

The product of its digits is 43200, while the sum is 40.

The square root of 13918855 is about 3730.7981719734. The cubic root of 13918855 is about 240.5476786479.

The spelling of 13918855 in words is "thirteen million, nine hundred eighteen thousand, eight hundred fifty-five".

Divisors: 1 5 2783771 13918855