7444562221 has 2 divisors, whose sum is σ = 7444562222. Its totient is φ = 7444562220.

The previous prime is 7444562143. The next prime is 7444562233. The reversal of 7444562221 is 1222654447.

7444562221 = 61010² + 61011².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3722342121 + 3722220100 = 61011^2 + 61010^2 .

It is a cyclic number.

It is not a de Polignac number, because 7444562221 - 2¹⁵ = 7444529453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7444562261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3722281110 + 3722281111.

It is an arithmetic number, because the mean of its divisors is an integer number (3722281111).

Almost surely, 2^7444562221 is an apocalyptic number.

7444562221 is the 61011-st centered square number.

It is an amenable number.

7444562221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7444562221 is an equidigital number, since it uses as much as digits as its factorization.

7444562221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 37.

The square root of 7444562221 is about 86281.8765500612. The cubic root of 7444562221 is about 1952.5989646228.

The spelling of 7444562221 in words is "seven billion, four hundred forty-four million, five hundred sixty-two thousand, two hundred twenty-one".