22287873 has 4 divisors (see below), whose sum is σ = 29717168. Its totient is φ = 14858580.

The previous prime is 22287871. The next prime is 22287929. The reversal of 22287873 is 37878222.

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 not a de Polignac number, because 22287873 - 2¹ = 22287871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22287871) 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, 3714643 + ... + 3714648.

It is an arithmetic number, because the mean of its divisors is an integer number (7429292).

Almost surely, 2^22287873 is an apocalyptic number.

It is an amenable number.

22287873 is a deficient number, since it is larger than the sum of its proper divisors (7429295).

22287873 is an equidigital number, since it uses as much as digits as its factorization.

22287873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7429294.

The product of its digits is 75264, while the sum is 39.

The square root of 22287873 is about 4721.0033891113. The cubic root of 22287873 is about 281.4208096251.

It can be divided in two parts, 2228 and 7873, that added together give a palindrome (10101).

The spelling of 22287873 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred seventy-three".