55320120 has 96 divisors (see below), whose sum is σ = 185627520. Its totient is φ = 14273280.

The previous prime is 55320101. The next prime is 55320131. The reversal of 55320120 is 2102355.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 55320093 and 55320102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8682 + ... + 13638.

It is an arithmetic number, because the mean of its divisors is an integer number (1933620).

Almost surely, 2^55320120 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 55320120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92813760).

55320120 is an abundant number, since it is smaller than the sum of its proper divisors (130307400).

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

55320120 is a wasteful number, since it uses less digits than its factorization.

55320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005 (or 4998 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 55320120 is about 7437.7496596753. The cubic root of 55320120 is about 381.0316381027.

Adding to 55320120 its reverse (2102355), we get a palindrome (57422475).

The spelling of 55320120 in words is "fifty-five million, three hundred twenty thousand, one hundred twenty".