22645147 has 8 divisors (see below), whose sum is σ = 26579936. Its totient is φ = 18885312.

The previous prime is 22645127. The next prime is 22645163. The reversal of 22645147 is 74154622.

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

It is a cyclic number.

It is not a de Polignac number, because 22645147 - 2⁷ = 22645019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22645127) 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 7 ways as a sum of consecutive naturals, for example, 43458 + ... + 43975.

It is an arithmetic number, because the mean of its divisors is an integer number (3322492).

Almost surely, 2^22645147 is an apocalyptic number.

22645147 is a deficient number, since it is larger than the sum of its proper divisors (3934789).

22645147 is an equidigital number, since it uses as much as digits as its factorization.

22645147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87477.

The product of its digits is 13440, while the sum is 31.

The square root of 22645147 is about 4758.6917319784. The cubic root of 22645147 is about 282.9165681962.

Adding to 22645147 its reverse (74154622), we get a palindrome (96799769).

The spelling of 22645147 in words is "twenty-two million, six hundred forty-five thousand, one hundred forty-seven".