22640317 has 8 divisors (see below), whose sum is σ = 26476736. Its totient is φ = 18954432.

The previous prime is 22640291. The next prime is 22640339. The reversal of 22640317 is 71304622.

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

It is not a de Polignac number, because 22640317 - 2¹¹ = 22638269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22640291 and 22640300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37308 + ... + 37909.

It is an arithmetic number, because the mean of its divisors is an integer number (3309592).

Almost surely, 2^22640317 is an apocalyptic number.

It is an amenable number.

22640317 is a deficient number, since it is larger than the sum of its proper divisors (3836419).

22640317 is an equidigital number, since it uses as much as digits as its factorization.

22640317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75267.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 22640317 is about 4758.1842124911. The cubic root of 22640317 is about 282.8964522719.

Adding to 22640317 its reverse (71304622), we get a palindrome (93944939).

The spelling of 22640317 in words is "twenty-two million, six hundred forty thousand, three hundred seventeen".