211444013 has 4 divisors (see below), whose sum is σ = 230666208. Its totient is φ = 192221820.

The previous prime is 211444007. The next prime is 211444021. The reversal of 211444013 is 310444112.

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 211444013 - 2⁶ = 211443949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211444003) 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, 9611081 + ... + 9611102.

It is an arithmetic number, because the mean of its divisors is an integer number (57666552).

Almost surely, 2^211444013 is an apocalyptic number.

It is an amenable number.

211444013 is a deficient number, since it is larger than the sum of its proper divisors (19222195).

211444013 is a wasteful number, since it uses less digits than its factorization.

211444013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19222194.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 211444013 is about 14541.1145721365. The cubic root of 211444013 is about 595.7514813388.

Adding to 211444013 its reverse (310444112), we get a palindrome (521888125).

Subtracting 211444013 from its reverse (310444112), we obtain a palindrome (99000099).

The spelling of 211444013 in words is "two hundred eleven million, four hundred forty-four thousand, thirteen".