22561312205 has 4 divisors (see below), whose sum is σ = 27073574652. Its totient is φ = 18049049760.

The previous prime is 22561312117. The next prime is 22561312211. The reversal of 22561312205 is 50221316522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4955737609 + 17605574596 = 70397^2 + 132686^2 .

It is not a de Polignac number, because 22561312205 - 2¹² = 22561308109 is a prime.

It is a super-2 number, since 2×22561312205² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256131216 + ... + 2256131225.

It is an arithmetic number, because the mean of its divisors is an integer number (6768393663).

Almost surely, 2^22561312205 is an apocalyptic number.

It is an amenable number.

22561312205 is a deficient number, since it is larger than the sum of its proper divisors (4512262447).

22561312205 is an equidigital number, since it uses as much as digits as its factorization.

22561312205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512262446.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 22561312205 its reverse (50221316522), we get a palindrome (72782628727).

The spelling of 22561312205 in words is "twenty-two billion, five hundred sixty-one million, three hundred twelve thousand, two hundred five".