22243237 has 4 divisors (see below), whose sum is σ = 22253056. Its totient is φ = 22233420.

The previous prime is 22243229. The next prime is 22243283. The reversal of 22243237 is 73234222.

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, 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 22243237 - 2³ = 22243229 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 (22243217) 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, 412 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (5563264).

Almost surely, 2^22243237 is an apocalyptic number.

It is an amenable number.

22243237 is a deficient number, since it is larger than the sum of its proper divisors (9819).

22243237 is an equidigital number, since it uses as much as digits as its factorization.

22243237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818.

The product of its digits is 4032, while the sum is 25.

The square root of 22243237 is about 4716.2736349792. The cubic root of 22243237 is about 281.2328165963.

Adding to 22243237 its reverse (73234222), we get a palindrome (95477459).

The spelling of 22243237 in words is "twenty-two million, two hundred forty-three thousand, two hundred thirty-seven".