22218719065 has 8 divisors (see below), whose sum is σ = 26663507208. Its totient is φ = 17774279040.

The previous prime is 22218719053. The next prime is 22218719093. The reversal of 22218719065 is 56091781222.

It can be written as a sum of positive squares in 4 ways, for example, as 4130889984 + 18087829081 = 64272^2 + 134491^2 .

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

It is not a de Polignac number, because 22218719065 - 2⁹ = 22218718553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83919 + ... + 226891.

It is an arithmetic number, because the mean of its divisors is an integer number (3332938401).

Almost surely, 2^22218719065 is an apocalyptic number.

It is an amenable number.

22218719065 is a deficient number, since it is larger than the sum of its proper divisors (4444788143).

22218719065 is a wasteful number, since it uses less digits than its factorization.

22218719065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174059.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 22218719065 in words is "twenty-two billion, two hundred eighteen million, seven hundred nineteen thousand, sixty-five".