22198587 has 4 divisors (see below), whose sum is σ = 29598120. Its totient is φ = 14799056.

The previous prime is 22198513. The next prime is 22198591. The reversal of 22198587 is 78589122.

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

It is a cyclic number.

It is not a de Polignac number, because 22198587 - 2⁷ = 22198459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22198987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3699762 + ... + 3699767.

It is an arithmetic number, because the mean of its divisors is an integer number (7399530).

Almost surely, 2^22198587 is an apocalyptic number.

22198587 is a deficient number, since it is larger than the sum of its proper divisors (7399533).

22198587 is an equidigital number, since it uses as much as digits as its factorization.

22198587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7399532.

The product of its digits is 80640, while the sum is 42.

The square root of 22198587 is about 4711.5376470957. The cubic root of 22198587 is about 281.0445128169.

The spelling of 22198587 in words is "twenty-two million, one hundred ninety-eight thousand, five hundred eighty-seven".