21227941 has 8 divisors (see below), whose sum is σ = 24436160. Its totient is φ = 18063648.

The previous prime is 21227933. The next prime is 21227977. The reversal of 21227941 is 14972212.

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 21227941 - 2³ = 21227933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227911) 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, 9936 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (3054520).

Almost surely, 2^21227941 is an apocalyptic number.

It is an amenable number.

21227941 is a deficient number, since it is larger than the sum of its proper divisors (3208219).

21227941 is a wasteful number, since it uses less digits than its factorization.

21227941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21963.

The product of its digits is 2016, while the sum is 28.

The square root of 21227941 is about 4607.3789729086. The cubic root of 21227941 is about 276.8870370497.

The spelling of 21227941 in words is "twenty-one million, two hundred twenty-seven thousand, nine hundred forty-one".