21227035 has 4 divisors (see below), whose sum is σ = 25472448. Its totient is φ = 16981624.

The previous prime is 21227023. The next prime is 21227081. The reversal of 21227035 is 53072212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21227035 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21226997 and 21227015.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2122699 + ... + 2122708.

It is an arithmetic number, because the mean of its divisors is an integer number (6368112).

Almost surely, 2^21227035 is an apocalyptic number.

21227035 is a deficient number, since it is larger than the sum of its proper divisors (4245413).

21227035 is an equidigital number, since it uses as much as digits as its factorization.

21227035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245412.

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

The square root of 21227035 is about 4607.2806513170. The cubic root of 21227035 is about 276.8830978511.

Adding to 21227035 its reverse (53072212), we get a palindrome (74299247).

The spelling of 21227035 in words is "twenty-one million, two hundred twenty-seven thousand, thirty-five".