213231203323 has 4 divisors (see below), whose sum is σ = 213245165320. Its totient is φ = 213217241328.

The previous prime is 213231203293. The next prime is 213231203327. The reversal of 213231203323 is 323302132312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213231203323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213231203327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6958065 + ... + 6988642.

It is an arithmetic number, because the mean of its divisors is an integer number (53311291330).

Almost surely, 2^213231203323 is an apocalyptic number.

213231203323 is a deficient number, since it is larger than the sum of its proper divisors (13961997).

213231203323 is a wasteful number, since it uses less digits than its factorization.

213231203323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13961996.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 213231203323 its reverse (323302132312), we get a palindrome (536533335635).

The spelling of 213231203323 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred three thousand, three hundred twenty-three".