555520 has 80 divisors (see below), whose sum is σ = 1571328. Its totient is φ = 184320.

The previous prime is 555491. The next prime is 555521. The reversal of 555520 is 25555.

555520 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (80).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 555491 and 555500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555521) by changing a digit.

555520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17905 + ... + 17935.

2⁵⁵⁵⁵²⁰ 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 555520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785664).

555520 is an abundant number, since it is smaller than the sum of its proper divisors (1015808).

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

555520 is an equidigital number, since it uses as much as digits as its factorization.

555520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 22.

The square root of 555520 is about 745.3321407265. The cubic root of 555520 is about 82.2053153561.

The spelling of 555520 in words is "five hundred fifty-five thousand, five hundred twenty".