55543520 has 48 divisors (see below), whose sum is σ = 134437968. Its totient is φ = 21672960.

The previous prime is 55543463. The next prime is 55543529. The reversal of 55543520 is 2534555.

It is a happy number.

55543520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55543520² = 6170165227980800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55543529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2327 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (2800791).

Almost surely, 2^55543520 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 55543520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67218984).

55543520 is an abundant number, since it is smaller than the sum of its proper divisors (78894448).

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

55543520 is a wasteful number, since it uses less digits than its factorization.

55543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8523 (or 8515 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 55543520 is about 7452.7525116563. The cubic root of 55543520 is about 381.5438576507.

The spelling of 55543520 in words is "fifty-five million, five hundred forty-three thousand, five hundred twenty".