7221741477449 has 2 divisors, whose sum is σ = 7221741477450. Its totient is φ = 7221741477448.

The previous prime is 7221741477413. The next prime is 7221741477479. The reversal of 7221741477449 is 9447741471227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6114279907849 + 1107461569600 = 2472707^2 + 1052360^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221741477449 - 2²⁰ = 7221740428873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7221741477479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610870738724 + 3610870738725.

It is an arithmetic number, because the mean of its divisors is an integer number (3610870738725).

Almost surely, 2^{7221741477449} is an apocalyptic number.

It is an amenable number.

7221741477449 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221741477449 is an equidigital number, since it uses as much as digits as its factorization.

7221741477449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22127616, while the sum is 59.

The spelling of 7221741477449 in words is "seven trillion, two hundred twenty-one billion, seven hundred forty-one million, four hundred seventy-seven thousand, four hundred forty-nine".