7229221779 has 16 divisors (see below), whose sum is σ = 10497060000. Its totient is φ = 4398763776.

The previous prime is 7229221777. The next prime is 7229221781. The reversal of 7229221779 is 9771229227.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7229221777) and next prime (7229221781).

It is not a de Polignac number, because 7229221779 - 2¹ = 7229221777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7229221771) by changing a digit.

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, 1037904 + ... + 1044845.

It is an arithmetic number, because the mean of its divisors is an integer number (656066250).

Almost surely, 2^7229221779 is an apocalyptic number.

7229221779 is a deficient number, since it is larger than the sum of its proper divisors (3267838221).

7229221779 is a wasteful number, since it uses less digits than its factorization.

7229221779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082854.

The product of its digits is 444528, while the sum is 48.

The square root of 7229221779 is about 85024.8303673697. The cubic root of 7229221779 is about 1933.5875872280.

The spelling of 7229221779 in words is "seven billion, two hundred twenty-nine million, two hundred twenty-one thousand, seven hundred seventy-nine".