2204613561 has 4 divisors (see below), whose sum is σ = 2939484752. Its totient is φ = 1469742372.

The previous prime is 2204613559. The next prime is 2204613581. The reversal of 2204613561 is 1653164022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2204613561 - 2¹ = 2204613559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2204613511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367435591 + ... + 367435596.

It is an arithmetic number, because the mean of its divisors is an integer number (734871188).

Almost surely, 2^2204613561 is an apocalyptic number.

It is an amenable number.

2204613561 is a deficient number, since it is larger than the sum of its proper divisors (734871191).

2204613561 is an equidigital number, since it uses as much as digits as its factorization.

2204613561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734871190.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2204613561 is about 46953.3125668467. The cubic root of 2204613561 is about 1301.4999572240.

Adding to 2204613561 its reverse (1653164022), we get a palindrome (3857777583).

The spelling of 2204613561 in words is "two billion, two hundred four million, six hundred thirteen thousand, five hundred sixty-one".