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55565 = 511113
BaseRepresentation
bin1101100100001101
32211012222
431210031
53234230
61105125
7320666
oct154415
984188
1055565
1138824
12281a5
131c3a3
141636d
15116e5
hexd90d

55565 has 4 divisors (see below), whose sum is σ = 66684. Its totient is φ = 44448.

The previous prime is 55547. The next prime is 55579. The reversal of 55565 is 56555.

55565 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: 56555 = 511311.

It can be written as a sum of positive squares in 2 ways, for example, as 6724 + 48841 = 82^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 55565 - 26 = 55501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55565.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5552 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (16671).

255565 is an apocalyptic number.

It is an amenable number.

55565 is a deficient number, since it is larger than the sum of its proper divisors (11119).

55565 is a wasteful number, since it uses less digits than its factorization.

55565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11118.

The product of its digits is 3750, while the sum is 26.

The square root of 55565 is about 235.7222942362. The cubic root of 55565 is about 38.1593035339.

Subtracting from 55565 its product of digits (3750), we obtain a palindrome (51815).

Subtracting 55565 from its reverse (56555), we obtain a triangular number (990 = T44).

The spelling of 55565 in words is "fifty-five thousand, five hundred sixty-five".

Divisors: 1 5 11113 55565