55332420 has 96 divisors (see below), whose sum is σ = 182044800. Its totient is φ = 12380160.

The previous prime is 55332413. The next prime is 55332449. The reversal of 55332420 is 2423355.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5356 + ... + 11804.

It is an arithmetic number, because the mean of its divisors is an integer number (1896300).

Almost surely, 2^55332420 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 55332420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91022400).

55332420 is an abundant number, since it is smaller than the sum of its proper divisors (126712380).

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

55332420 is a wasteful number, since it uses less digits than its factorization.

55332420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485 (or 6483 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 55332420 is about 7438.5764767192. The cubic root of 55332420 is about 381.0598758206.

Adding to 55332420 its reverse (2423355), we get a palindrome (57755775).

The spelling of 55332420 in words is "fifty-five million, three hundred thirty-two thousand, four hundred twenty".