22681559 has 4 divisors (see below), whose sum is σ = 22831920. Its totient is φ = 22531200.

The previous prime is 22681523. The next prime is 22681609. The reversal of 22681559 is 95518622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95518622 = 2 ⋅47759311.

It is a cyclic number.

It is not a de Polignac number, because 22681559 - 2²⁰ = 21632983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22681759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74954 + ... + 75255.

It is an arithmetic number, because the mean of its divisors is an integer number (5707980).

Almost surely, 2^22681559 is an apocalyptic number.

22681559 is a deficient number, since it is larger than the sum of its proper divisors (150361).

22681559 is a wasteful number, since it uses less digits than its factorization.

22681559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150360.

The product of its digits is 43200, while the sum is 38.

The square root of 22681559 is about 4762.5160367184. The cubic root of 22681559 is about 283.0681244596.

The spelling of 22681559 in words is "twenty-two million, six hundred eighty-one thousand, five hundred fifty-nine".