22222237 has 4 divisors (see below), whose sum is σ = 22822876. Its totient is φ = 21621600.

The previous prime is 22222223. The next prime is 22222253. The reversal of 22222237 is 73222222.

It is a happy number.

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 19945156 + 2277081 = 4466^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222237 - 2²³ = 13833629 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300264 + ... + 300337.

It is an arithmetic number, because the mean of its divisors is an integer number (5705719).

Almost surely, 2^22222237 is an apocalyptic number.

It is an amenable number.

22222237 is a deficient number, since it is larger than the sum of its proper divisors (600639).

22222237 is an equidigital number, since it uses as much as digits as its factorization.

22222237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600638.

The product of its digits is 1344, while the sum is 22.

The square root of 22222237 is about 4714.0467753301. The cubic root of 22222237 is about 281.1442840875.

Adding to 22222237 its reverse (73222222), we get a palindrome (95444459).

The spelling of 22222237 in words is "twenty-two million, two hundred twenty-two thousand, two hundred thirty-seven".