2221111553 has 2 divisors, whose sum is σ = 2221111554. Its totient is φ = 2221111552.

The previous prime is 2221111549. The next prime is 2221111559. The reversal of 2221111553 is 3551111222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1969318129 + 251793424 = 44377^2 + 15868^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221111553 - 2² = 2221111549 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221111559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110555776 + 1110555777.

It is an arithmetic number, because the mean of its divisors is an integer number (1110555777).

Almost surely, 2^2221111553 is an apocalyptic number.

It is an amenable number.

2221111553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221111553 is an equidigital number, since it uses as much as digits as its factorization.

2221111553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 2221111553 is about 47128.6701806873. The cubic root of 2221111553 is about 1304.7384380097.

Adding to 2221111553 its reverse (3551111222), we get a palindrome (5772222775).

The spelling of 2221111553 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand, five hundred fifty-three".