22545321 has 16 divisors (see below), whose sum is σ = 31194048. Its totient is φ = 14472000.

The previous prime is 22545317. The next prime is 22545329. The reversal of 22545321 is 12354522.

It is not a de Polignac number, because 22545321 - 2² = 22545317 is a prime.

It is a super-3 number, since 3×22545321³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22545291 and 22545300.

It is not an unprimeable number, because it can be changed into a prime (22545329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10206 + ... + 12216.

It is an arithmetic number, because the mean of its divisors is an integer number (1949628).

Almost surely, 2^22545321 is an apocalyptic number.

It is an amenable number.

22545321 is a deficient number, since it is larger than the sum of its proper divisors (8648727).

22545321 is a wasteful number, since it uses less digits than its factorization.

22545321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152.

The product of its digits is 2400, while the sum is 24.

The square root of 22545321 is about 4748.1913398683. The cubic root of 22545321 is about 282.5002312891.

Adding to 22545321 its reverse (12354522), we get a palindrome (34899843).

The spelling of 22545321 in words is "twenty-two million, five hundred forty-five thousand, three hundred twenty-one".