6221278851 has 16 divisors (see below), whose sum is σ = 8813232000. Its totient is φ = 3892503168.

The previous prime is 6221278849. The next prime is 6221278859. The reversal of 6221278851 is 1588721226.

It is not a de Polignac number, because 6221278851 - 2¹ = 6221278849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6221278859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503926 + ... + 516123.

It is an arithmetic number, because the mean of its divisors is an integer number (550827000).

Almost surely, 2^6221278851 is an apocalyptic number.

6221278851 is a deficient number, since it is larger than the sum of its proper divisors (2591953149).

6221278851 is a wasteful number, since it uses less digits than its factorization.

6221278851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020178.

The product of its digits is 107520, while the sum is 42.

The square root of 6221278851 is about 78875.0838414768. The cubic root of 6221278851 is about 1839.1898263535.

The spelling of 6221278851 in words is "six billion, two hundred twenty-one million, two hundred seventy-eight thousand, eight hundred fifty-one".