55843520 has 84 divisors (see below), whose sum is σ = 137586720. Its totient is φ = 21585408.

The previous prime is 55843519. The next prime is 55843523. The reversal of 55843520 is 2534855.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55843523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 706841 + ... + 706919.

Almost surely, 2^55843520 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 55843520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68793360).

55843520 is an abundant number, since it is smaller than the sum of its proper divisors (81743200).

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

55843520 is an equidigital number, since it uses as much as digits as its factorization.

55843520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 55843520 is about 7472.8521997963. The cubic root of 55843520 is about 382.2295523703.

The spelling of 55843520 in words is "fifty-five million, eight hundred forty-three thousand, five hundred twenty".