22251465 has 24 divisors (see below), whose sum is σ = 40248000. Its totient is φ = 11350944.

The previous prime is 22251421. The next prime is 22251473. The reversal of 22251465 is 56415222.

It is not a de Polignac number, because 22251465 - 2¹¹ = 22249417 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9715 + ... + 11784.

It is an arithmetic number, because the mean of its divisors is an integer number (1677000).

Almost surely, 2^22251465 is an apocalyptic number.

It is an amenable number.

22251465 is a deficient number, since it is larger than the sum of its proper divisors (17996535).

22251465 is a wasteful number, since it uses less digits than its factorization.

22251465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21533 (or 21530 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 22251465 is about 4717.1458531616. The cubic root of 22251465 is about 281.2674892828.

Adding to 22251465 its reverse (56415222), we get a palindrome (78666687).

The spelling of 22251465 in words is "twenty-two million, two hundred fifty-one thousand, four hundred sixty-five".