22198891 has 32 divisors (see below), whose sum is σ = 27760320. Its totient is φ = 17472000.

The previous prime is 22198877. The next prime is 22198903. The reversal of 22198891 is 19889122.

It is not a de Polignac number, because 22198891 - 2¹¹ = 22196843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22198801) 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, 219741 + ... + 219841.

It is an arithmetic number, because the mean of its divisors is an integer number (867510).

Almost surely, 2^22198891 is an apocalyptic number.

22198891 is a deficient number, since it is larger than the sum of its proper divisors (5561429).

22198891 is a wasteful number, since it uses less digits than its factorization.

22198891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207.

The product of its digits is 20736, while the sum is 40.

The square root of 22198891 is about 4711.5699082153. The cubic root of 22198891 is about 281.0457957385.

The spelling of 22198891 in words is "twenty-two million, one hundred ninety-eight thousand, eight hundred ninety-one".