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55345 = 511069
BaseRepresentation
bin1101100000110001
32210220211
431200301
53232340
61104121
7320233
oct154061
983824
1055345
1138644
1228041
131c264
1416253
15115ea
hexd831

55345 has 4 divisors (see below), whose sum is σ = 66420. Its totient is φ = 44272.

The previous prime is 55343. The next prime is 55351. The reversal of 55345 is 54355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11664 + 43681 = 108^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 55345 - 21 = 55343 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5530 + ... + 5539.

It is an arithmetic number, because the mean of its divisors is an integer number (16605).

255345 is an apocalyptic number.

It is an amenable number.

55345 is a deficient number, since it is larger than the sum of its proper divisors (11075).

55345 is a wasteful number, since it uses less digits than its factorization.

55345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074.

The product of its digits is 1500, while the sum is 22.

The square root of 55345 is about 235.2551806018. The cubic root of 55345 is about 38.1088752020.

Subtracting from 55345 its reverse (54355), we obtain a triangular number (990 = T44).

It can be divided in two parts, 55 and 345, that added together give a square (400 = 202).

The spelling of 55345 in words is "fifty-five thousand, three hundred forty-five".

Divisors: 1 5 11069 55345