55573120 has 64 divisors (see below), whose sum is σ = 134835840. Its totient is φ = 21898240.

The previous prime is 55573117. The next prime is 55573121. The reversal of 55573120 is 2137555.

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

It is not an unprimeable number, because it can be changed into a prime (55573121) 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, 44829 + ... + 46051.

It is an arithmetic number, because the mean of its divisors is an integer number (2106810).

Almost surely, 2^55573120 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 55573120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67417920).

55573120 is an abundant number, since it is smaller than the sum of its proper divisors (79262720).

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

55573120 is a wasteful number, since it uses less digits than its factorization.

55573120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 55573120 is about 7454.7380906374. The cubic root of 55573120 is about 381.6116224868.

The spelling of 55573120 in words is "fifty-five million, five hundred seventy-three thousand, one hundred twenty".