22282581 has 8 divisors (see below), whose sum is σ = 29744704. Its totient is φ = 14837760.

The previous prime is 22282577. The next prime is 22282591. The reversal of 22282581 is 18528222.

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

It is not a de Polignac number, because 22282581 - 2² = 22282577 is a prime.

It is a super-2 number, since 2×22282581² = 993026832043122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22282501) 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, 940 + ... + 6741.

It is an arithmetic number, because the mean of its divisors is an integer number (3718088).

Almost surely, 2^22282581 is an apocalyptic number.

It is an amenable number.

22282581 is a deficient number, since it is larger than the sum of its proper divisors (7462123).

22282581 is an equidigital number, since it uses as much as digits as its factorization.

22282581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651.

The product of its digits is 5120, while the sum is 30.

The square root of 22282581 is about 4720.4428817644. The cubic root of 22282581 is about 281.3985344800.

The spelling of 22282581 in words is "twenty-two million, two hundred eighty-two thousand, five hundred eighty-one".