55477 has 4 divisors (see below), whose sum is σ = 57420. Its totient is φ = 53536.

The previous prime is 55469. The next prime is 55487. The reversal of 55477 is 77455.

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 39601 + 15876 = 199^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 55477 - 2³ = 55469 is a prime.

It is an Ulam number.

55477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55457) 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, 928 + ... + 985.

It is an arithmetic number, because the mean of its divisors is an integer number (14355).

2⁵⁵⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

55477 is a deficient number, since it is larger than the sum of its proper divisors (1943).

55477 is a wasteful number, since it uses less digits than its factorization.

55477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942.

The product of its digits is 4900, while the sum is 28.

The square root of 55477 is about 235.5355599480. The cubic root of 55477 is about 38.1391482023.

The spelling of 55477 in words is "fifty-five thousand, four hundred seventy-seven".