22118455 has 4 divisors (see below), whose sum is σ = 26542152. Its totient is φ = 17694760.

The previous prime is 22118449. The next prime is 22118461. The reversal of 22118455 is 55481122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22118449) and next prime (22118461).

It is not a de Polignac number, because 22118455 - 2⁹ = 22117943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211841 + ... + 2211850.

It is an arithmetic number, because the mean of its divisors is an integer number (6635538).

Almost surely, 2^22118455 is an apocalyptic number.

22118455 is a deficient number, since it is larger than the sum of its proper divisors (4423697).

22118455 is an equidigital number, since it uses as much as digits as its factorization.

22118455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423696.

The product of its digits is 3200, while the sum is 28.

The square root of 22118455 is about 4703.0261534463. The cubic root of 22118455 is about 280.7059355375.

Adding to 22118455 its reverse (55481122), we get a palindrome (77599577).

The spelling of 22118455 in words is "twenty-two million, one hundred eighteen thousand, four hundred fifty-five".