22118555 has 8 divisors (see below), whose sum is σ = 27159792. Its totient is φ = 17283168.

The previous prime is 22118533. The next prime is 22118567. The reversal of 22118555 is 55581122.

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 22118555 - 2⁶ = 22118491 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, 51224 + ... + 51653.

It is an arithmetic number, because the mean of its divisors is an integer number (3394974).

Almost surely, 2^22118555 is an apocalyptic number.

22118555 is a deficient number, since it is larger than the sum of its proper divisors (5041237).

22118555 is a wasteful number, since it uses less digits than its factorization.

22118555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102925.

The product of its digits is 4000, while the sum is 29.

The square root of 22118555 is about 4703.0367848870. The cubic root of 22118555 is about 280.7063585711.

Adding to 22118555 its reverse (55581122), we get a palindrome (77699677).

The spelling of 22118555 in words is "twenty-two million, one hundred eighteen thousand, five hundred fifty-five".