21227133 has 8 divisors (see below), whose sum is σ = 28333600. Its totient is φ = 14136048.

The previous prime is 21227113. The next prime is 21227177. The reversal of 21227133 is 33172212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21227133 - 2¹⁸ = 20964989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227113) 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, 103 + ... + 6516.

It is an arithmetic number, because the mean of its divisors is an integer number (3541700).

Almost surely, 2^21227133 is an apocalyptic number.

It is an amenable number.

21227133 is a deficient number, since it is larger than the sum of its proper divisors (7106467).

21227133 is a wasteful number, since it uses less digits than its factorization.

21227133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691.

The product of its digits is 504, while the sum is 21.

The square root of 21227133 is about 4607.2912866455. The cubic root of 21227133 is about 276.8835239509.

Adding to 21227133 its reverse (33172212), we get a palindrome (54399345).

The spelling of 21227133 in words is "twenty-one million, two hundred twenty-seven thousand, one hundred thirty-three".