213244322443243 has 32 divisors (see below), whose sum is σ = 274437363916800. Its totient is φ = 161048174766336.

The previous prime is 213244322443219. The next prime is 213244322443253. The reversal of 213244322443243 is 342344223442312.

It is a de Polignac number, because none of the positive numbers 2^k-213244322443243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213244322443243.

It is not an unprimeable number, because it can be changed into a prime (213244322443253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105348738 + ... + 107353831.

It is an arithmetic number, because the mean of its divisors is an integer number (8576167622400).

Almost surely, 2^{213244322443243} is an apocalyptic number.

213244322443243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213244322443243 is a deficient number, since it is larger than the sum of its proper divisors (61193041473557).

213244322443243 is a wasteful number, since it uses less digits than its factorization.

213244322443243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212703091.

The product of its digits is 2654208, while the sum is 43.

Adding to 213244322443243 its reverse (342344223442312), we get a palindrome (555588545885555).

The spelling of 213244322443243 in words is "two hundred thirteen trillion, two hundred forty-four billion, three hundred twenty-two million, four hundred forty-three thousand, two hundred forty-three".