21413201 has 4 divisors (see below), whose sum is σ = 21525504. Its totient is φ = 21300900.

The previous prime is 21413191. The next prime is 21413221. The reversal of 21413201 is 10231412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21413201 - 2¹⁰ = 21412177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21413221) 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 3 ways as a sum of consecutive naturals, for example, 55865 + ... + 56246.

It is an arithmetic number, because the mean of its divisors is an integer number (5381376).

Almost surely, 2^21413201 is an apocalyptic number.

It is an amenable number.

21413201 is a deficient number, since it is larger than the sum of its proper divisors (112303).

21413201 is a wasteful number, since it uses less digits than its factorization.

21413201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112302.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21413201 is about 4627.4400050136. The cubic root of 21413201 is about 277.6901858877.

Adding to 21413201 its reverse (10231412), we get a palindrome (31644613).

The spelling of 21413201 in words is "twenty-one million, four hundred thirteen thousand, two hundred one".