22272817 has 4 divisors (see below), whose sum is σ = 25454656. Its totient is φ = 19090980.

The previous prime is 22272797. The next prime is 22272821. The reversal of 22272817 is 71827222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22272817 - 2¹¹ = 22270769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22272847) 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, 1590909 + ... + 1590922.

It is an arithmetic number, because the mean of its divisors is an integer number (6363664).

Almost surely, 2^22272817 is an apocalyptic number.

It is an amenable number.

22272817 is a deficient number, since it is larger than the sum of its proper divisors (3181839).

22272817 is an equidigital number, since it uses as much as digits as its factorization.

22272817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181838.

The product of its digits is 6272, while the sum is 31.

The square root of 22272817 is about 4719.4085434512. The cubic root of 22272817 is about 281.3574264847.

The spelling of 22272817 in words is "twenty-two million, two hundred seventy-two thousand, eight hundred seventeen".