220244101561 has 16 divisors (see below), whose sum is σ = 253542686400. Its totient is φ = 189210816000.

The previous prime is 220244101543. The next prime is 220244101573. The reversal of 220244101561 is 165101442022.

220244101561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220244101561 - 2⁷ = 220244101433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220244101531) 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 15 ways as a sum of consecutive naturals, for example, 1230156 + ... + 1397773.

It is an arithmetic number, because the mean of its divisors is an integer number (15846417900).

Almost surely, 2^220244101561 is an apocalyptic number.

It is an amenable number.

220244101561 is a deficient number, since it is larger than the sum of its proper divisors (33298584839).

220244101561 is a wasteful number, since it uses less digits than its factorization.

220244101561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628360.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 220244101561 its reverse (165101442022), we get a palindrome (385345543583).

The spelling of 220244101561 in words is "two hundred twenty billion, two hundred forty-four million, one hundred one thousand, five hundred sixty-one".