22145321 has 8 divisors (see below), whose sum is σ = 24314304. Its totient is φ = 20002320.

The previous prime is 22145311. The next prime is 22145323. The reversal of 22145321 is 12354122.

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 22145321 - 2¹⁴ = 22128937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22145293 and 22145302.

It is not an unprimeable number, because it can be changed into a prime (22145323) 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, 4685 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (3039288).

Almost surely, 2^22145321 is an apocalyptic number.

It is an amenable number.

22145321 is a deficient number, since it is larger than the sum of its proper divisors (2168983).

22145321 is a wasteful number, since it uses less digits than its factorization.

22145321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991.

The product of its digits is 480, while the sum is 20.

The square root of 22145321 is about 4705.8815327205. The cubic root of 22145321 is about 280.8195419405.

Adding to 22145321 its reverse (12354122), we get a palindrome (34499443).

The spelling of 22145321 in words is "twenty-two million, one hundred forty-five thousand, three hundred twenty-one".