55016556 has 96 divisors (see below), whose sum is σ = 158215680. Its totient is φ = 14521344.

The previous prime is 55016531. The next prime is 55016587. The reversal of 55016556 is 65561055.

It is a super-2 number, since 2×55016556² = 6053642868202272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83926 + ... + 84578.

It is an arithmetic number, because the mean of its divisors is an integer number (1648080).

Almost surely, 2^55016556 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 55016556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79107840).

55016556 is an abundant number, since it is smaller than the sum of its proper divisors (103199124).

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

55016556 is a wasteful number, since it uses less digits than its factorization.

55016556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55016556 is about 7417.3146084011. The cubic root of 55016556 is about 380.3334008425. Note that the first 3 decimals are identical.

The spelling of 55016556 in words is "fifty-five million, sixteen thousand, five hundred fifty-six".