22231065 has 16 divisors (see below), whose sum is σ = 35702208. Its totient is φ = 11812416.

The previous prime is 22231057. The next prime is 22231067. The reversal of 22231065 is 56013222.

It is not a de Polignac number, because 22231065 - 2³ = 22231057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22231067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1627 + ... + 6863.

It is an arithmetic number, because the mean of its divisors is an integer number (2231388).

Almost surely, 2^22231065 is an apocalyptic number.

It is an amenable number.

22231065 is a deficient number, since it is larger than the sum of its proper divisors (13471143).

22231065 is a wasteful number, since it uses less digits than its factorization.

22231065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22231065 is about 4714.9830328433. The cubic root of 22231065 is about 281.1815082601.

Adding to 22231065 its reverse (56013222), we get a palindrome (78244287).

The spelling of 22231065 in words is "twenty-two million, two hundred thirty-one thousand, sixty-five".