55055880 has 96 divisors (see below), whose sum is σ = 195212160. Its totient is φ = 13345920.

The previous prime is 55055879. The next prime is 55055893. The reversal of 55055880 is 8855055.

It is a super-2 number, since 2×55055880² = 6062299845148800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 2992 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (2033460).

Almost surely, 2^55055880 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 55055880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97606080).

55055880 is an abundant number, since it is smaller than the sum of its proper divisors (140156280).

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

55055880 is a wasteful number, since it uses less digits than its factorization.

55055880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13931 (or 13924 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The square root of 55055880 is about 7419.9649594860. The cubic root of 55055880 is about 380.4239958061.

The spelling of 55055880 in words is "fifty-five million, fifty-five thousand, eight hundred eighty".