55443520 has 112 divisors (see below), whose sum is σ = 151790400. Its totient is φ = 19077120.

The previous prime is 55443517. The next prime is 55443527. The reversal of 55443520 is 2534455.

It is not an unprimeable number, because it can be changed into a prime (55443527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66466 + ... + 67294.

Almost surely, 2^55443520 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 55443520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75895200).

55443520 is an abundant number, since it is smaller than the sum of its proper divisors (96346880).

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

55443520 is a wasteful number, since it uses less digits than its factorization.

55443520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55443520 is about 7446.0405585788. The cubic root of 55443520 is about 381.3147441778.

Adding to 55443520 its reverse (2534455), we get a palindrome (57977975).

It can be divided in two parts, 554435 and 20, that added together give a palindrome (554455).

The spelling of 55443520 in words is "fifty-five million, four hundred forty-three thousand, five hundred twenty".