22191061 has 4 divisors (see below), whose sum is σ = 22956300. Its totient is φ = 21425824.

The previous prime is 22191019. The next prime is 22191073. The reversal of 22191061 is 16019122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7128900 + 15062161 = 2670^2 + 3881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22191061 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 (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, 382576 + ... + 382633.

It is an arithmetic number, because the mean of its divisors is an integer number (5739075).

Almost surely, 2^22191061 is an apocalyptic number.

It is an amenable number.

22191061 is a deficient number, since it is larger than the sum of its proper divisors (765239).

22191061 is an equidigital number, since it uses as much as digits as its factorization.

22191061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765238.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 22191061 is about 4710.7389017011. The cubic root of 22191061 is about 281.0127483314.

The spelling of 22191061 in words is "twenty-two million, one hundred ninety-one thousand, sixty-one".