22505613 has 8 divisors (see below), whose sum is σ = 32315808. Its totient is φ = 13849584.

The previous prime is 22505611. The next prime is 22505617. The reversal of 22505613 is 31650522.

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

It is not a de Polignac number, because 22505613 - 2¹ = 22505611 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288495 + ... + 288572.

It is an arithmetic number, because the mean of its divisors is an integer number (4039476).

Almost surely, 2^22505613 is an apocalyptic number.

It is an amenable number.

22505613 is a deficient number, since it is larger than the sum of its proper divisors (9810195).

22505613 is a wasteful number, since it uses less digits than its factorization.

22505613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577083.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 22505613 is about 4744.0081155074. The cubic root of 22505613 is about 282.3342824246.

The spelling of 22505613 in words is "twenty-two million, five hundred five thousand, six hundred thirteen".