22220027561 has 8 divisors (see below), whose sum is σ = 22910341344. Its totient is φ = 21537603360.

The previous prime is 22220027537. The next prime is 22220027579. The reversal of 22220027561 is 16572002222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22220027561 - 2¹⁰ = 22220026537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220027591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966676 + ... + 1977941.

It is an arithmetic number, because the mean of its divisors is an integer number (2863792668).

Almost surely, 2^22220027561 is an apocalyptic number.

It is an amenable number.

22220027561 is a deficient number, since it is larger than the sum of its proper divisors (690313783).

22220027561 is a wasteful number, since it uses less digits than its factorization.

22220027561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944791.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 22220027561 its reverse (16572002222), we get a palindrome (38792029783).

The spelling of 22220027561 in words is "twenty-two billion, two hundred twenty million, twenty-seven thousand, five hundred sixty-one".