22322561 has 4 divisors (see below), whose sum is σ = 22339632. Its totient is φ = 22305492.

The previous prime is 22322557. The next prime is 22322567. The reversal of 22322561 is 16522322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16522322 = 2 ⋅8261161.

It is a cyclic number.

It is not a de Polignac number, because 22322561 - 2² = 22322557 is a prime.

It is a super-3 number, since 3×22322561³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22322567) 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 3 ways as a sum of consecutive naturals, for example, 6395 + ... + 9248.

It is an arithmetic number, because the mean of its divisors is an integer number (5584908).

Almost surely, 2^22322561 is an apocalyptic number.

It is an amenable number.

22322561 is a deficient number, since it is larger than the sum of its proper divisors (17071).

22322561 is a wasteful number, since it uses less digits than its factorization.

22322561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17070.

The product of its digits is 1440, while the sum is 23.

The square root of 22322561 is about 4724.6757560705. The cubic root of 22322561 is about 281.5667315061.

Adding to 22322561 its reverse (16522322), we get a palindrome (38844883).

The spelling of 22322561 in words is "twenty-two million, three hundred twenty-two thousand, five hundred sixty-one".