22985581 has 4 divisors (see below), whose sum is σ = 24337692. Its totient is φ = 21633472.

The previous prime is 22985561. The next prime is 22985587. The reversal of 22985581 is 18558922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21206025 + 1779556 = 4605^2 + 1334^2 .

It is a cyclic number.

It is not a de Polignac number, because 22985581 - 2⁵ = 22985549 is a prime.

It is a super-2 number, since 2×22985581² = 1056673867815122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22985587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676030 + ... + 676063.

It is an arithmetic number, because the mean of its divisors is an integer number (6084423).

Almost surely, 2^22985581 is an apocalyptic number.

It is an amenable number.

22985581 is a deficient number, since it is larger than the sum of its proper divisors (1352111).

22985581 is a wasteful number, since it uses less digits than its factorization.

22985581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352110.

The product of its digits is 57600, while the sum is 40.

The square root of 22985581 is about 4794.3280029635. The cubic root of 22985581 is about 284.3272569852.

The spelling of 22985581 in words is "twenty-two million, nine hundred eighty-five thousand, five hundred eighty-one".