55248320 has 56 divisors (see below), whose sum is σ = 134800848. Its totient is φ = 21555200.

The previous prime is 55248307. The next prime is 55248329. The reversal of 55248320 is 2384255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55248329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11015 + ... + 15225.

It is an arithmetic number, because the mean of its divisors is an integer number (2407158).

Almost surely, 2^55248320 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 55248320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67400424).

55248320 is an abundant number, since it is smaller than the sum of its proper divisors (79552528).

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

55248320 is a wasteful number, since it uses less digits than its factorization.

55248320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269 (or 4259 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 55248320 is about 7432.9213637708. The cubic root of 55248320 is about 380.8667197078.

The spelling of 55248320 in words is "fifty-five million, two hundred forty-eight thousand, three hundred twenty".