22009527 has 12 divisors (see below), whose sum is σ = 31958784. Its totient is φ = 14595840.

The previous prime is 22009513. The next prime is 22009529. The reversal of 22009527 is 72590022.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-22009527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22009527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22009529) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4599 + ... + 8072.

It is an arithmetic number, because the mean of its divisors is an integer number (2663232).

Almost surely, 2^22009527 is an apocalyptic number.

22009527 is a deficient number, since it is larger than the sum of its proper divisors (9949257).

22009527 is a wasteful number, since it uses less digits than its factorization.

22009527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12870 (or 12867 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 22009527 is about 4691.4312315113. The cubic root of 22009527 is about 280.2443742417.

Adding to 22009527 its reverse (72590022), we get a palindrome (94599549).

The spelling of 22009527 in words is "twenty-two million, nine thousand, five hundred twenty-seven".