55507 has 4 divisors (see below), whose sum is σ = 56736. Its totient is φ = 54280.

The previous prime is 55501. The next prime is 55511. The reversal of 55507 is 70555.

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

It is a cyclic number.

It is not a de Polignac number, because 55507 - 2¹⁵ = 22739 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 Duffinian number.

55507 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (55501) 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, 544 + ... + 637.

It is an arithmetic number, because the mean of its divisors is an integer number (14184).

2⁵⁵⁵⁰⁷ is an apocalyptic number.

55507 is a deficient number, since it is larger than the sum of its proper divisors (1229).

55507 is a wasteful number, since it uses less digits than its factorization.

55507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228.

The product of its (nonzero) digits is 875, while the sum is 22.

The square root of 55507 is about 235.5992359920. The cubic root of 55507 is about 38.1460217311.

The spelling of 55507 in words is "fifty-five thousand, five hundred seven".