22545309 has 8 divisors (see below), whose sum is σ = 30186112. Its totient is φ = 14967360.

The previous prime is 22545293. The next prime is 22545317. The reversal of 22545309 is 90354522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22545309 - 2⁴ = 22545293 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 (22545329) 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 7 ways as a sum of consecutive naturals, for example, 14869 + ... + 16314.

It is an arithmetic number, because the mean of its divisors is an integer number (3773264).

Almost surely, 2^22545309 is an apocalyptic number.

It is an amenable number.

22545309 is a deficient number, since it is larger than the sum of its proper divisors (7640803).

22545309 is a wasteful number, since it uses less digits than its factorization.

22545309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31427.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 22545309 is about 4748.1900762290. The cubic root of 22545309 is about 282.5001811678.

The spelling of 22545309 in words is "twenty-two million, five hundred forty-five thousand, three hundred nine".