22516549 has 4 divisors (see below), whose sum is σ = 24563520. Its totient is φ = 20469580.

The previous prime is 22516547. The next prime is 22516553. The reversal of 22516549 is 94561522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22516549 - 2¹ = 22516547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22516547) 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, 1023469 + ... + 1023490.

It is an arithmetic number, because the mean of its divisors is an integer number (6140880).

Almost surely, 2^22516549 is an apocalyptic number.

It is an amenable number.

22516549 is a deficient number, since it is larger than the sum of its proper divisors (2046971).

22516549 is a wasteful number, since it uses less digits than its factorization.

22516549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046970.

The product of its digits is 21600, while the sum is 34.

The square root of 22516549 is about 4745.1605873774. The cubic root of 22516549 is about 282.3800059475.

The spelling of 22516549 in words is "twenty-two million, five hundred sixteen thousand, five hundred forty-nine".