2204111561 has 2 divisors, whose sum is σ = 2204111562. Its totient is φ = 2204111560.

The previous prime is 2204111537. The next prime is 2204111627. The reversal of 2204111561 is 1651114022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2147395600 + 56715961 = 46340^2 + 7531^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204111561 - 2¹⁴ = 2204095177 is a prime.

It is a super-3 number, since 3×2204111561³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2204116561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102055780 + 1102055781.

It is an arithmetic number, because the mean of its divisors is an integer number (1102055781).

Almost surely, 2^2204111561 is an apocalyptic number.

It is an amenable number.

2204111561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204111561 is an equidigital number, since it uses as much as digits as its factorization.

2204111561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2204111561 is about 46947.9665267837. The cubic root of 2204111561 is about 1301.4011640104.

Adding to 2204111561 its reverse (1651114022), we get a palindrome (3855225583).

The spelling of 2204111561 in words is "two billion, two hundred four million, one hundred eleven thousand, five hundred sixty-one".