2221320553 has 2 divisors, whose sum is σ = 2221320554. Its totient is φ = 2221320552.

The previous prime is 2221320529. The next prime is 2221320581. The reversal of 2221320553 is 3550231222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2126316544 + 95004009 = 46112^2 + 9747^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221320553 - 2²⁵ = 2187766121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221320053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110660276 + 1110660277.

It is an arithmetic number, because the mean of its divisors is an integer number (1110660277).

Almost surely, 2^2221320553 is an apocalyptic number.

It is an amenable number.

2221320553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221320553 is an equidigital number, since it uses as much as digits as its factorization.

2221320553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2221320553 is about 47130.8874624699. The cubic root of 2221320553 is about 1304.7793607301.

Adding to 2221320553 its reverse (3550231222), we get a palindrome (5771551775).

The spelling of 2221320553 in words is "two billion, two hundred twenty-one million, three hundred twenty thousand, five hundred fifty-three".