22730237 has 4 divisors (see below), whose sum is σ = 22740060. Its totient is φ = 22720416.

The previous prime is 22730221. The next prime is 22730249. The reversal of 22730237 is 73203722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8637721 + 14092516 = 2939^2 + 3754^2 .

It is a cyclic number.

It is not a de Polignac number, because 22730237 - 2⁴ = 22730221 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 (22730737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689 + ... + 6777.

It is an arithmetic number, because the mean of its divisors is an integer number (5685015).

Almost surely, 2^22730237 is an apocalyptic number.

It is an amenable number.

22730237 is a deficient number, since it is larger than the sum of its proper divisors (9823).

22730237 is an equidigital number, since it uses as much as digits as its factorization.

22730237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 22730237 is about 4767.6238316377. The cubic root of 22730237 is about 283.2704818681.

Adding to 22730237 its reverse (73203722), we get a palindrome (95933959).

The spelling of 22730237 in words is "twenty-two million, seven hundred thirty thousand, two hundred thirty-seven".