22404220161 has 4 divisors (see below), whose sum is σ = 29872293552. Its totient is φ = 14936146772.

The previous prime is 22404220159. The next prime is 22404220207. The reversal of 22404220161 is 16102240422.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 22404220161 - 2¹ = 22404220159 is a prime.

It is a super-3 number, since 3×22404220161³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22404220961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3734036691 + ... + 3734036696.

It is an arithmetic number, because the mean of its divisors is an integer number (7468073388).

Almost surely, 2^22404220161 is an apocalyptic number.

It is an amenable number.

22404220161 is a deficient number, since it is larger than the sum of its proper divisors (7468073391).

22404220161 is an equidigital number, since it uses as much as digits as its factorization.

22404220161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7468073390.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 22404220161 its reverse (16102240422), we get a palindrome (38506460583).

The spelling of 22404220161 in words is "twenty-two billion, four hundred four million, two hundred twenty thousand, one hundred sixty-one".