22190855 has 4 divisors (see below), whose sum is σ = 26629032. Its totient is φ = 17752680.

The previous prime is 22190821. The next prime is 22190893. The reversal of 22190855 is 55809122.

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

It is not a de Polignac number, because 22190855 - 2⁸ = 22190599 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, 2219081 + ... + 2219090.

It is an arithmetic number, because the mean of its divisors is an integer number (6657258).

Almost surely, 2^22190855 is an apocalyptic number.

22190855 is a deficient number, since it is larger than the sum of its proper divisors (4438177).

22190855 is an equidigital number, since it uses as much as digits as its factorization.

22190855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438176.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 22190855 is about 4710.7170367153. The cubic root of 22190855 is about 281.0118787800.

Adding to 22190855 its reverse (55809122), we get a palindrome (77999977).

The spelling of 22190855 in words is "twenty-two million, one hundred ninety thousand, eight hundred fifty-five".