22561917 has 8 divisors (see below), whose sum is σ = 34380096. Its totient is φ = 12892512.

The previous prime is 22561859. The next prime is 22561933. The reversal of 22561917 is 71916522.

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

It is not a de Polignac number, because 22561917 - 2⁶ = 22561853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561117) 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, 537168 + ... + 537209.

It is an arithmetic number, because the mean of its divisors is an integer number (4297512).

Almost surely, 2^22561917 is an apocalyptic number.

It is an amenable number.

22561917 is a deficient number, since it is larger than the sum of its proper divisors (11818179).

22561917 is a wasteful number, since it uses less digits than its factorization.

22561917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074387.

The product of its digits is 7560, while the sum is 33.

The square root of 22561917 is about 4749.9386311825. The cubic root of 22561917 is about 282.5695320532.

The spelling of 22561917 in words is "twenty-two million, five hundred sixty-one thousand, nine hundred seventeen".