6221420855 has 16 divisors (see below), whose sum is σ = 8041686240. Its totient is φ = 4593310848.

The previous prime is 6221420801. The next prime is 6221420867. The reversal of 6221420855 is 5580241226.

It is a cyclic number.

It is not a de Polignac number, because 6221420855 - 2⁸ = 6221420599 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487901 + ... + 500489.

It is an arithmetic number, because the mean of its divisors is an integer number (502605390).

Almost surely, 2^6221420855 is an apocalyptic number.

6221420855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6221420855 is a deficient number, since it is larger than the sum of its proper divisors (1820265385).

6221420855 is a wasteful number, since it uses less digits than its factorization.

6221420855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20210.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 6221420855 is about 78875.9840192184. The cubic root of 6221420855 is about 1839.2038197425.

The spelling of 6221420855 in words is "six billion, two hundred twenty-one million, four hundred twenty thousand, eight hundred fifty-five".