22191371 has 4 divisors (see below), whose sum is σ = 22213200. Its totient is φ = 22169544.

The previous prime is 22191361. The next prime is 22191391. The reversal of 22191371 is 17319122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22191371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22191371.

It is not an unprimeable number, because it can be changed into a prime (22191361) 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, 9311 + ... + 11448.

It is an arithmetic number, because the mean of its divisors is an integer number (5553300).

Almost surely, 2^22191371 is an apocalyptic number.

22191371 is a deficient number, since it is larger than the sum of its proper divisors (21829).

22191371 is a wasteful number, since it uses less digits than its factorization.

22191371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21828.

The product of its digits is 756, while the sum is 26.

The square root of 22191371 is about 4710.7718051292. The cubic root of 22191371 is about 281.0140568695.

The spelling of 22191371 in words is "twenty-two million, one hundred ninety-one thousand, three hundred seventy-one".