21228883 has 8 divisors (see below), whose sum is σ = 23204048. Its totient is φ = 19302624.

The previous prime is 21228881. The next prime is 21228901. The reversal of 21228883 is 38882212.

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 21228883 - 2¹ = 21228881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21228881) 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, 11316 + ... + 13057.

It is an arithmetic number, because the mean of its divisors is an integer number (2900506).

Almost surely, 2^21228883 is an apocalyptic number.

21228883 is a deficient number, since it is larger than the sum of its proper divisors (1975165).

21228883 is a wasteful number, since it uses less digits than its factorization.

21228883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24453.

The product of its digits is 12288, while the sum is 34.

The square root of 21228883 is about 4607.4811990935. The cubic root of 21228883 is about 276.8911326539.

The spelling of 21228883 in words is "twenty-one million, two hundred twenty-eight thousand, eight hundred eighty-three".