6221727138 has 16 divisors (see below), whose sum is σ = 13574677536. Its totient is φ = 1885371840.

The previous prime is 6221727107. The next prime is 6221727139. The reversal of 6221727138 is 8317271226.

It is a junction number, because it is equal to n+sod(n) for n = 6221727096 and 6221727105.

It is not an unprimeable number, because it can be changed into a prime (6221727139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47134231 + ... + 47134362.

It is an arithmetic number, because the mean of its divisors is an integer number (848417346).

Almost surely, 2^6221727138 is an apocalyptic number.

6221727138 is an abundant number, since it is smaller than the sum of its proper divisors (7352950398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6221727138 is a wasteful number, since it uses less digits than its factorization.

6221727138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94268609.

The product of its digits is 56448, while the sum is 39.

The square root of 6221727138 is about 78877.9255432089. The cubic root of 6221727138 is about 1839.2340008234.

The spelling of 6221727138 in words is "six billion, two hundred twenty-one million, seven hundred twenty-seven thousand, one hundred thirty-eight".