7222279 has 2 divisors, whose sum is σ = 7222280. Its totient is φ = 7222278.

The previous prime is 7222219. The next prime is 7222291. The reversal of 7222279 is 9722227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7222279 - 2¹¹ = 7220231 is a prime.

It is a super-2 number, since 2×7222279² = 104322627907682, which contains 22 as substring.

It is an Ulam number.

7222279 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7222279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3611139 + 3611140.

It is an arithmetic number, because the mean of its divisors is an integer number (3611140).

Almost surely, 2^7222279 is an apocalyptic number.

7222279 is a deficient number, since it is larger than the sum of its proper divisors (1).

7222279 is an equidigital number, since it uses as much as digits as its factorization.

7222279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 7222279 is about 2687.4298130370. The cubic root of 7222279 is about 193.2968397892.

The spelling of 7222279 in words is "seven million, two hundred twenty-two thousand, two hundred seventy-nine".