22215504545 has 32 divisors (see below), whose sum is σ = 30444234912. Its totient is φ = 15416819712.

The previous prime is 22215504541. The next prime is 22215504547. The reversal of 22215504545 is 54540551222.

It can be written as a sum of positive squares in 16 ways, for example, as 2006323264 + 20209181281 = 44792^2 + 142159^2 .

It is a cyclic number.

It is not a de Polignac number, because 22215504545 - 2² = 22215504541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22215504541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728729 + ... + 758601.

It is an arithmetic number, because the mean of its divisors is an integer number (951382341).

Almost surely, 2^22215504545 is an apocalyptic number.

It is an amenable number.

22215504545 is a deficient number, since it is larger than the sum of its proper divisors (8228730367).

22215504545 is a wasteful number, since it uses less digits than its factorization.

22215504545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30581.

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 22215504545 in words is "twenty-two billion, two hundred fifteen million, five hundred four thousand, five hundred forty-five".