55304320 has 32 divisors (see below), whose sum is σ = 132213420. Its totient is φ = 22121472.

The previous prime is 55304303. The next prime is 55304323. The reversal of 55304320 is 2340355.

It can be written as a sum of positive squares in 2 ways, for example, as 55234624 + 69696 = 7432^2 + 264^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 55304291 and 55304300.

It is not an unprimeable number, because it can be changed into a prime (55304323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42567 + ... + 43846.

Almost surely, 2^55304320 is an apocalyptic number.

It is an amenable number.

55304320 is an abundant number, since it is smaller than the sum of its proper divisors (76909100).

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

55304320 is an equidigital number, since it uses as much as digits as its factorization.

55304320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86432 (or 86420 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 55304320 is about 7436.6874346042. The cubic root of 55304320 is about 380.9953591194.

Adding to 55304320 its reverse (2340355), we get a palindrome (57644675).

The spelling of 55304320 in words is "fifty-five million, three hundred four thousand, three hundred twenty".