213443344403243 has 16 divisors (see below), whose sum is σ = 219262689609600. Its totient is φ = 207722544906240.

The previous prime is 213443344403203. The next prime is 213443344403323. The reversal of 213443344403243 is 342304443344312.

It is a cyclic number.

It is not a de Polignac number, because 213443344403243 - 2⁸ = 213443344402987 is a prime.

It is a super-2 number, since 2×213443344403243² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213443344403194 and 213443344403203.

It is not an unprimeable number, because it can be changed into a prime (213443344403203) 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 15 ways as a sum of consecutive naturals, for example, 64433558 + ... + 67665131.

It is an arithmetic number, because the mean of its divisors is an integer number (13703918100600).

Almost surely, 2^{213443344403243} is an apocalyptic number.

213443344403243 is a deficient number, since it is larger than the sum of its proper divisors (5819345206357).

213443344403243 is a wasteful number, since it uses less digits than its factorization.

213443344403243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132099062.

The product of its (nonzero) digits is 3981312, while the sum is 44.

Adding to 213443344403243 its reverse (342304443344312), we get a palindrome (555747787747555).

The spelling of 213443344403243 in words is "two hundred thirteen trillion, four hundred forty-three billion, three hundred forty-four million, four hundred three thousand, two hundred forty-three".