21200241 has 8 divisors (see below), whose sum is σ = 29929824. Its totient is φ = 13302080.

The previous prime is 21200233. The next prime is 21200279. The reversal of 21200241 is 14200212.

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 21200241 - 2³ = 21200233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200281) 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, 207795 + ... + 207896.

It is an arithmetic number, because the mean of its divisors is an integer number (3741228).

Almost surely, 2^21200241 is an apocalyptic number.

It is an amenable number.

21200241 is a deficient number, since it is larger than the sum of its proper divisors (8729583).

21200241 is a wasteful number, since it uses less digits than its factorization.

21200241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415711.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21200241 is about 4604.3719441418. The cubic root of 21200241 is about 276.7665494747.

Adding to 21200241 its reverse (14200212), we get a palindrome (35400453).

The spelling of 21200241 in words is "twenty-one million, two hundred thousand, two hundred forty-one".