22718545 has 8 divisors (see below), whose sum is σ = 28866024. Its totient is φ = 17105664.

The previous prime is 22718519. The next prime is 22718587. The reversal of 22718545 is 54581722.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3323329 + 19395216 = 1823^2 + 4404^2 .

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 22718545 - 2⁷ = 22718417 is a prime.

It is a super-2 number, since 2×22718545² = 1032264573834050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22718545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133554 + ... + 133723.

It is an arithmetic number, because the mean of its divisors is an integer number (3608253).

Almost surely, 2^22718545 is an apocalyptic number.

It is an amenable number.

22718545 is a deficient number, since it is larger than the sum of its proper divisors (6147479).

22718545 is a wasteful number, since it uses less digits than its factorization.

22718545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267299.

The product of its digits is 22400, while the sum is 34.

The square root of 22718545 is about 4766.3974865720. The cubic root of 22718545 is about 283.2219038952.

It can be divided in two parts, 2271 and 8545, that added together give a square (10816 = 104²).

The spelling of 22718545 in words is "twenty-two million, seven hundred eighteen thousand, five hundred forty-five".