55708224 has 112 divisors (see below), whose sum is σ = 173248320. Its totient is φ = 15575040.

The previous prime is 55708223. The next prime is 55708229. The reversal of 55708224 is 42280755.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55708223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26442 + ... + 28470.

It is an arithmetic number, because the mean of its divisors is an integer number (1546860).

Almost surely, 2^55708224 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 55708224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86624160).

55708224 is an abundant number, since it is smaller than the sum of its proper divisors (117540096).

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

55708224 is a wasteful number, since it uses less digits than its factorization.

55708224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068 (or 2058 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 55708224 is about 7463.7942093817. The cubic root of 55708224 is about 381.9206179906.

Adding to 55708224 its reverse (42280755), we get a palindrome (97988979).

The spelling of 55708224 in words is "fifty-five million, seven hundred eight thousand, two hundred twenty-four".