22198487 has 4 divisors (see below), whose sum is σ = 22418376. Its totient is φ = 21978600.

The previous prime is 22198459. The next prime is 22198489. The reversal of 22198487 is 78489122.

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 22198487 - 2¹⁴ = 22182103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22198489) 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, 109793 + ... + 109994.

It is an arithmetic number, because the mean of its divisors is an integer number (5604594).

Almost surely, 2^22198487 is an apocalyptic number.

22198487 is a deficient number, since it is larger than the sum of its proper divisors (219889).

22198487 is a wasteful number, since it uses less digits than its factorization.

22198487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219888.

The product of its digits is 64512, while the sum is 41.

The square root of 22198487 is about 4711.5270348370. The cubic root of 22198487 is about 281.0440908006.

The spelling of 22198487 in words is "twenty-two million, one hundred ninety-eight thousand, four hundred eighty-seven".