22272791 has 4 divisors (see below), whose sum is σ = 22397400. Its totient is φ = 22148184.

The previous prime is 22272749. The next prime is 22272793. The reversal of 22272791 is 19727222.

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 22272791 - 2⁶ = 22272727 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 (22272793) 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, 62036 + ... + 62393.

It is an arithmetic number, because the mean of its divisors is an integer number (5599350).

Almost surely, 2^22272791 is an apocalyptic number.

22272791 is a deficient number, since it is larger than the sum of its proper divisors (124609).

22272791 is a wasteful number, since it uses less digits than its factorization.

22272791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124608.

The product of its digits is 7056, while the sum is 32.

The square root of 22272791 is about 4719.4057888679. The cubic root of 22272791 is about 281.3573170045.

The spelling of 22272791 in words is "twenty-two million, two hundred seventy-two thousand, seven hundred ninety-one".