800520055 has 16 divisors (see below), whose sum is σ = 1019378304. Its totient is φ = 601413120.

The previous prime is 800520047. The next prime is 800520067. The reversal of 800520055 is 550025008.

It is not a de Polignac number, because 800520055 - 2³ = 800520047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29185 + ... + 49525.

It is an arithmetic number, because the mean of its divisors is an integer number (63711144).

Almost surely, 2^800520055 is an apocalyptic number.

800520055 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

800520055 is a deficient number, since it is larger than the sum of its proper divisors (218858249).

800520055 is a wasteful number, since it uses less digits than its factorization.

800520055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20826.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 800520055 is about 28293.4631142955. The cubic root of 800520055 is about 928.5188799398.

The spelling of 800520055 in words is "eight hundred million, five hundred twenty thousand, fifty-five".