55604 has 6 divisors (see below), whose sum is σ = 97314. Its totient is φ = 27800.

The previous prime is 55603. The next prime is 55609. The reversal of 55604 is 40655.

55604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 52900 + 2704 = 230^2 + 52^2 .

55604 is a repfigit number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6947 + ... + 6954.

It is an arithmetic number, because the mean of its divisors is an integer number (16219).

2⁵⁵⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

55604 is a deficient number, since it is larger than the sum of its proper divisors (41710).

55604 is a wasteful number, since it uses less digits than its factorization.

55604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13905 (or 13903 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 55604 is about 235.8050041878. The cubic root of 55604 is about 38.1682292053.

The spelling of 55604 in words is "fifty-five thousand, six hundred four".