55173504 has 64 divisors (see below), whose sum is σ = 152951040. Its totient is φ = 17588736.

The previous prime is 55173491. The next prime is 55173509. The reversal of 55173504 is 40537155.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55173509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5709 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (2389860).

Almost surely, 2^55173504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55173504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76475520).

55173504 is an abundant number, since it is smaller than the sum of its proper divisors (97777536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55173504 is a wasteful number, since it uses less digits than its factorization.

55173504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287 (or 6275 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 55173504 is about 7427.8869135172. The cubic root of 55173504 is about 380.6947217383.

The spelling of 55173504 in words is "fifty-five million, one hundred seventy-three thousand, five hundred four".