55369 has 4 divisors (see below), whose sum is σ = 58644. Its totient is φ = 52096.

The previous prime is 55351. The next prime is 55373. The reversal of 55369 is 96355.

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 45369 + 10000 = 213^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 55369 - 2⁵ = 55337 is a prime.

It is a super-2 number, since 2×55369² = 6131452322, which contains 22 as substring.

It is a Duffinian number.

55369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (55339) 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, 1612 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (14661).

2⁵⁵³⁶⁹ is an apocalyptic number.

It is an amenable number.

55369 is a deficient number, since it is larger than the sum of its proper divisors (3275).

55369 is a wasteful number, since it uses less digits than its factorization.

55369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274.

The product of its digits is 4050, while the sum is 28.

The square root of 55369 is about 235.3061835142. The cubic root of 55369 is about 38.1143829614.

It can be divided in two parts, 55 and 369, that added together give a palindrome (424).

The spelling of 55369 in words is "fifty-five thousand, three hundred sixty-nine".