22531065 has 16 divisors (see below), whose sum is σ = 36155328. Its totient is φ = 11981376.

The previous prime is 22531051. The next prime is 22531073. The reversal of 22531065 is 56013522.

It is not a de Polignac number, because 22531065 - 2⁴ = 22531049 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3582 + ... + 7608.

It is an arithmetic number, because the mean of its divisors is an integer number (2259708).

Almost surely, 2^22531065 is an apocalyptic number.

It is an amenable number.

22531065 is a deficient number, since it is larger than the sum of its proper divisors (13624263).

22531065 is a wasteful number, since it uses less digits than its factorization.

22531065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 22531065 is about 4746.6898992877. The cubic root of 22531065 is about 282.4406746232.

Adding to 22531065 its reverse (56013522), we get a palindrome (78544587).

The spelling of 22531065 in words is "twenty-two million, five hundred thirty-one thousand, sixty-five".