550000055 has 12 divisors (see below), whose sum is σ = 725455416. Its totient is φ = 399999600.

The previous prime is 550000021. The next prime is 550000091.

It is a happy number.

550000055 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 550000055 - 2²⁰ = 548951479 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 549999991 and 550000036.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453941 + ... + 455150.

It is an arithmetic number, because the mean of its divisors is an integer number (60454618).

Almost surely, 2^550000055 is an apocalyptic number.

550000055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

550000055 is a deficient number, since it is larger than the sum of its proper divisors (175455361).

550000055 is a wasteful number, since it uses less digits than its factorization.

550000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909118 (or 909107 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 550000055 is about 23452.0799717211. The cubic root of 550000055 is about 819.3212979114.

It can be divided in two parts, 5500000 and 55, that added together give a palindrome (5500055).

The spelling of 550000055 in words is "five hundred fifty million, fifty-five", and thus it is an aban number.