805216055 has 16 divisors (see below), whose sum is σ = 1105769280. Its totient is φ = 551411712.

The previous prime is 805216031. The next prime is 805216063. The reversal of 805216055 is 550612508.

It is a cyclic number.

It is not a de Polignac number, because 805216055 - 2¹² = 805211959 is a prime.

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, 11957 + ... + 41873.

It is an arithmetic number, because the mean of its divisors is an integer number (69110580).

Almost surely, 2^805216055 is an apocalyptic number.

805216055 is a deficient number, since it is larger than the sum of its proper divisors (300553225).

805216055 is a wasteful number, since it uses less digits than its factorization.

805216055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30698.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 805216055 is about 28376.3291318662. The cubic root of 805216055 is about 930.3309628694.

The spelling of 805216055 in words is "eight hundred five million, two hundred sixteen thousand, fifty-five".