55120600 has 48 divisors (see below), whose sum is σ = 128898000. Its totient is φ = 21920640.

The previous prime is 55120547. The next prime is 55120601. The reversal of 55120600 is 602155.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55120601) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 38701 + ... + 40099.

It is an arithmetic number, because the mean of its divisors is an integer number (2685375).

Almost surely, 2^55120600 is an apocalyptic number.

55120600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55120600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64449000).

55120600 is an abundant number, since it is smaller than the sum of its proper divisors (73777400).

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

55120600 is a wasteful number, since it uses less digits than its factorization.

55120600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55120600 is about 7424.3248851327. The cubic root of 55120600 is about 380.5730044114.

Adding to 55120600 its reverse (602155), we get a palindrome (55722755).

The spelling of 55120600 in words is "fifty-five million, one hundred twenty thousand, six hundred".