6226279821 has 24 divisors (see below), whose sum is σ = 9388033304. Its totient is φ = 3972447360.

The previous prime is 6226279811. The next prime is 6226279849. The reversal of 6226279821 is 1289726226.

It can be written as a sum of positive squares in 4 ways, for example, as 2062158921 + 4164120900 = 45411^2 + 64530^2 .

It is not a de Polignac number, because 6226279821 - 2⁵ = 6226279789 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6226279811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132946 + ... + 173571.

Almost surely, 2^6226279821 is an apocalyptic number.

6226279821 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6226279821 is a deficient number, since it is larger than the sum of its proper divisors (3161753483).

6226279821 is a wasteful number, since it uses less digits than its factorization.

6226279821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306621 (or 306618 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 6226279821 is about 78906.7793095118. The cubic root of 6226279821 is about 1839.6825047848.

The spelling of 6226279821 in words is "six billion, two hundred twenty-six million, two hundred seventy-nine thousand, eight hundred twenty-one".