21896227 has 8 divisors (see below), whose sum is σ = 23101200. Its totient is φ = 20696544.

The previous prime is 21896213. The next prime is 21896239. The reversal of 21896227 is 72269812.

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 21896227 - 2⁷ = 21896099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21896027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9549 + ... + 11617.

It is an arithmetic number, because the mean of its divisors is an integer number (2887650).

Almost surely, 2^21896227 is an apocalyptic number.

21896227 is a deficient number, since it is larger than the sum of its proper divisors (1204973).

21896227 is a wasteful number, since it uses less digits than its factorization.

21896227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645.

The product of its digits is 24192, while the sum is 37.

The square root of 21896227 is about 4679.3404449773. The cubic root of 21896227 is about 279.7626687901.

The spelling of 21896227 in words is "twenty-one million, eight hundred ninety-six thousand, two hundred twenty-seven".