55000055 has 16 divisors (see below), whose sum is σ = 72720288. Its totient is φ = 39600000.

The previous prime is 55000031. The next prime is 55000069.

It is a happy number.

55000055 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55000055 - 2¹⁰ = 54999031 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605 + ... + 10505.

It is an arithmetic number, because the mean of its divisors is an integer number (4545018).

Almost surely, 2^55000055 is an apocalyptic number.

55000055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55000055 is a deficient number, since it is larger than the sum of its proper divisors (17720233).

55000055 is a wasteful number, since it uses less digits than its factorization.

55000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018.

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

The square root of 55000055 is about 7416.2021951940. The cubic root of 55000055 is about 380.2953728412.

It can be divided in two parts, 550000 and 55, that multiplied together give a square (30250000 = 5500²).

The spelling of 55000055 in words is "fifty-five million, fifty-five", and thus it is an aban number and an uban number.