21822485 has 8 divisors (see below), whose sum is σ = 26681400. Its totient is φ = 17128384.

The previous prime is 21822473. The next prime is 21822487. The reversal of 21822485 is 58422812.

It can be written as a sum of positive squares in 4 ways, for example, as 5750404 + 16072081 = 2398^2 + 4009^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21822485 - 2⁶ = 21822421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822487) 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, 40910 + ... + 41439.

It is an arithmetic number, because the mean of its divisors is an integer number (3335175).

Almost surely, 2^21822485 is an apocalyptic number.

It is an amenable number.

21822485 is a deficient number, since it is larger than the sum of its proper divisors (4858915).

21822485 is an equidigital number, since it uses as much as digits as its factorization.

21822485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82407.

The product of its digits is 10240, while the sum is 32.

The square root of 21822485 is about 4671.4542703531. The cubic root of 21822485 is about 279.4482544751.

The spelling of 21822485 in words is "twenty-one million, eight hundred twenty-two thousand, four hundred eighty-five".