21295227 has 8 divisors (see below), whose sum is σ = 28736064. Its totient is φ = 14025608.

The previous prime is 21295207. The next prime is 21295231. The reversal of 21295227 is 72259212.

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 21295227 - 2¹⁵ = 21262459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21295194 and 21295203.

It is not an unprimeable number, because it can be changed into a prime (21295207) 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, 42513 + ... + 43010.

It is an arithmetic number, because the mean of its divisors is an integer number (3592008).

Almost surely, 2^21295227 is an apocalyptic number.

21295227 is a deficient number, since it is larger than the sum of its proper divisors (7440837).

21295227 is an equidigital number, since it uses as much as digits as its factorization.

21295227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85609.

The product of its digits is 5040, while the sum is 30.

The square root of 21295227 is about 4614.6751781680. The cubic root of 21295227 is about 277.1792772208.

The spelling of 21295227 in words is "twenty-one million, two hundred ninety-five thousand, two hundred twenty-seven".