7221774643 has 2 divisors, whose sum is σ = 7221774644. Its totient is φ = 7221774642.

The previous prime is 7221774629. The next prime is 7221774649. The reversal of 7221774643 is 3464771227.

7221774643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7221774643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7221774643.

It is not a weakly prime, because it can be changed into another prime (7221774649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610887321 + 3610887322.

It is an arithmetic number, because the mean of its divisors is an integer number (3610887322).

Almost surely, 2^7221774643 is an apocalyptic number.

7221774643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221774643 is an equidigital number, since it uses as much as digits as its factorization.

7221774643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 43.

The square root of 7221774643 is about 84981.0251938631. The cubic root of 7221774643 is about 1932.9234015298.

The spelling of 7221774643 in words is "seven billion, two hundred twenty-one million, seven hundred seventy-four thousand, six hundred forty-three".