21035227 has 2 divisors, whose sum is σ = 21035228. Its totient is φ = 21035226.

The previous prime is 21035219. The next prime is 21035233. The reversal of 21035227 is 72253012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21035227 - 2³ = 21035219 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21035198 and 21035207.

It is not a weakly prime, because it can be changed into another prime (21035207) 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 as a sum of consecutive naturals, namely, 10517613 + 10517614.

It is an arithmetic number, because the mean of its divisors is an integer number (10517614).

Almost surely, 2^21035227 is an apocalyptic number.

21035227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21035227 is an equidigital number, since it uses as much as digits as its factorization.

21035227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 21035227 is about 4586.4176652372. The cubic root of 21035227 is about 276.0465991122.

Adding to 21035227 its reverse (72253012), we get a palindrome (93288239).

The spelling of 21035227 in words is "twenty-one million, thirty-five thousand, two hundred twenty-seven".