22225751 has 4 divisors (see below), whose sum is σ = 23192112. Its totient is φ = 21259392.

The previous prime is 22225747. The next prime is 22225759. The reversal of 22225751 is 15752222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15752222 = 2 ⋅7876111.

It is a cyclic number.

It is not a de Polignac number, because 22225751 - 2² = 22225747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22225751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22225759) 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, 483146 + ... + 483191.

It is an arithmetic number, because the mean of its divisors is an integer number (5798028).

Almost surely, 2^22225751 is an apocalyptic number.

22225751 is a deficient number, since it is larger than the sum of its proper divisors (966361).

22225751 is an equidigital number, since it uses as much as digits as its factorization.

22225751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966360.

The product of its digits is 2800, while the sum is 26.

The square root of 22225751 is about 4714.4194764573. The cubic root of 22225751 is about 281.1591024119.

Adding to 22225751 its reverse (15752222), we get a palindrome (37977973).

The spelling of 22225751 in words is "twenty-two million, two hundred twenty-five thousand, seven hundred fifty-one".