55108816 has 120 divisors (see below), whose sum is σ = 136062720. Its totient is φ = 21143808.

The previous prime is 55108813. The next prime is 55108819. The reversal of 55108816 is 61880155.

It is an interprime number because it is at equal distance from previous prime (55108813) and next prime (55108819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55108813) 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 23 ways as a sum of consecutive naturals, for example, 1172505 + ... + 1172551.

It is an arithmetic number, because the mean of its divisors is an integer number (1133856).

Almost surely, 2^55108816 is an apocalyptic number.

55108816 is a gapful number since it is divisible by the number (56) 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 55108816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68031360).

55108816 is an abundant number, since it is smaller than the sum of its proper divisors (80953904).

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

55108816 is a wasteful number, since it uses less digits than its factorization.

55108816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 55108816 is about 7423.5312352007. The cubic root of 55108816 is about 380.5458821141.

The spelling of 55108816 in words is "fifty-five million, one hundred eight thousand, eight hundred sixteen".