21063227 has 2 divisors, whose sum is σ = 21063228. Its totient is φ = 21063226.

The previous prime is 21063223. The next prime is 21063233. The reversal of 21063227 is 72236012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21063227 - 2² = 21063223 is a prime.

It is not a weakly prime, because it can be changed into another prime (21063223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531613 + 10531614.

It is an arithmetic number, because the mean of its divisors is an integer number (10531614).

Almost surely, 2^21063227 is an apocalyptic number.

21063227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21063227 is an equidigital number, since it uses as much as digits as its factorization.

21063227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21063227 is about 4589.4691414149. The cubic root of 21063227 is about 276.1690267240.

Adding to 21063227 its reverse (72236012), we get a palindrome (93299239).

The spelling of 21063227 in words is "twenty-one million, sixty-three thousand, two hundred twenty-seven".