22509473 has 6 divisors (see below), whose sum is σ = 26184546. Its totient is φ = 19293792.

The previous prime is 22509469. The next prime is 22509491. The reversal of 22509473 is 37490522.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22391824 + 117649 = 4732^2 + 343^2 .

It is not a de Polignac number, because 22509473 - 2² = 22509469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22509413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229640 + ... + 229737.

It is an arithmetic number, because the mean of its divisors is an integer number (4364091).

Almost surely, 2^22509473 is an apocalyptic number.

It is an amenable number.

22509473 is a deficient number, since it is larger than the sum of its proper divisors (3675073).

22509473 is an equidigital number, since it uses as much as digits as its factorization.

22509473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459391 (or 459384 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 22509473 is about 4744.4149270484. The cubic root of 22509473 is about 282.3504228134.

Adding to 22509473 its reverse (37490522), we get a palindrome (59999995).

The spelling of 22509473 in words is "twenty-two million, five hundred nine thousand, four hundred seventy-three".