211444423013 has 4 divisors (see below), whose sum is σ = 212987813100. Its totient is φ = 209901032928.

The previous prime is 211444423007. The next prime is 211444423019. The reversal of 211444423013 is 310324444112.

211444423013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (211444423007) and next prime (211444423019).

It can be written as a sum of positive squares in 2 ways, for example, as 109851147844 + 101593275169 = 331438^2 + 318737^2 .

It is a cyclic number.

It is not a de Polignac number, because 211444423013 - 2²⁸ = 211175987557 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 (211444423019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771694838 + ... + 771695111.

It is an arithmetic number, because the mean of its divisors is an integer number (53246953275).

Almost surely, 2^211444423013 is an apocalyptic number.

It is an amenable number.

211444423013 is a deficient number, since it is larger than the sum of its proper divisors (1543390087).

211444423013 is a wasteful number, since it uses less digits than its factorization.

211444423013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543390086.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 211444423013 its reverse (310324444112), we get a palindrome (521768867125).

The spelling of 211444423013 in words is "two hundred eleven billion, four hundred forty-four million, four hundred twenty-three thousand, thirteen".