22251237 has 8 divisors (see below), whose sum is σ = 29738880. Its totient is φ = 14798880.

The previous prime is 22251227. The next prime is 22251239. The reversal of 22251237 is 73215222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22251237 - 2¹⁰ = 22250213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251239) 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 7 ways as a sum of consecutive naturals, for example, 7312 + ... + 9897.

It is an arithmetic number, because the mean of its divisors is an integer number (3717360).

Almost surely, 2^22251237 is an apocalyptic number.

It is an amenable number.

22251237 is a deficient number, since it is larger than the sum of its proper divisors (7487643).

22251237 is a wasteful number, since it uses less digits than its factorization.

22251237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17643.

The product of its digits is 1680, while the sum is 24.

The square root of 22251237 is about 4717.1216859437. The cubic root of 22251237 is about 281.2665286089.

Adding to 22251237 its reverse (73215222), we get a palindrome (95466459).

The spelling of 22251237 in words is "twenty-two million, two hundred fifty-one thousand, two hundred thirty-seven".