22561466 has 4 divisors (see below), whose sum is σ = 33842202. Its totient is φ = 11280732.

The previous prime is 22561447. The next prime is 22561471. The reversal of 22561466 is 66416522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66416522 = 2 ⋅33208261.

It can be written as a sum of positive squares in only one way, i.e., 22363441 + 198025 = 4729^2 + 445^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5640365 + ... + 5640368.

Almost surely, 2^22561466 is an apocalyptic number.

22561466 is a deficient number, since it is larger than the sum of its proper divisors (11280736).

22561466 is a wasteful number, since it uses less digits than its factorization.

22561466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11280735.

The product of its digits is 17280, while the sum is 32.

The square root of 22561466 is about 4749.8911566477. The cubic root of 22561466 is about 282.5676492387.

Adding to 22561466 its reverse (66416522), we get a palindrome (88977988).

The spelling of 22561466 in words is "twenty-two million, five hundred sixty-one thousand, four hundred sixty-six".