22541581 has 8 divisors (see below), whose sum is σ = 23774400. Its totient is φ = 21313440.

The previous prime is 22541573. The next prime is 22541627. The reversal of 22541581 is 18514522.

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

It is not a de Polignac number, because 22541581 - 2³ = 22541573 is a prime.

It is a super-2 number, since 2×22541581² = 1016245747959122, 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 (22541501) 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, 13680 + ... + 15238.

It is an arithmetic number, because the mean of its divisors is an integer number (2971800).

Almost surely, 2^22541581 is an apocalyptic number.

It is an amenable number.

22541581 is a deficient number, since it is larger than the sum of its proper divisors (1232819).

22541581 is a wasteful number, since it uses less digits than its factorization.

22541581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339.

The product of its digits is 3200, while the sum is 28.

The square root of 22541581 is about 4747.7974893628. The cubic root of 22541581 is about 282.4846092850.

The spelling of 22541581 in words is "twenty-two million, five hundred forty-one thousand, five hundred eighty-one".