22985191 has 4 divisors (see below), whose sum is σ = 22995432. Its totient is φ = 22974952.

The previous prime is 22985189. The next prime is 22985201. The reversal of 22985191 is 19158922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22985191 - 2¹ = 22985189 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 22985191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22985141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136 + ... + 6781.

It is an arithmetic number, because the mean of its divisors is an integer number (5748858).

Almost surely, 2^22985191 is an apocalyptic number.

22985191 is a deficient number, since it is larger than the sum of its proper divisors (10241).

22985191 is an equidigital number, since it uses as much as digits as its factorization.

22985191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10240.

The product of its digits is 12960, while the sum is 37.

The square root of 22985191 is about 4794.2873297290. The cubic root of 22985191 is about 284.3256489009.

The spelling of 22985191 in words is "twenty-two million, nine hundred eighty-five thousand, one hundred ninety-one".