22307945 has 8 divisors (see below), whose sum is σ = 29203200. Its totient is φ = 16223920.

The previous prime is 22307917. The next prime is 22307947. The reversal of 22307945 is 54970322.

It is a happy number.

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

It is not a de Polignac number, because 22307945 - 2¹⁸ = 22045801 is a prime.

It is a super-3 number, since 3×22307945³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22307947) 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, 202745 + ... + 202854.

It is an arithmetic number, because the mean of its divisors is an integer number (3650400).

Almost surely, 2^22307945 is an apocalyptic number.

It is an amenable number.

22307945 is a deficient number, since it is larger than the sum of its proper divisors (6895255).

22307945 is a wasteful number, since it uses less digits than its factorization.

22307945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405615.

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

The square root of 22307945 is about 4723.1287299840. The cubic root of 22307945 is about 281.5052648749.

The spelling of 22307945 in words is "twenty-two million, three hundred seven thousand, nine hundred forty-five".