213323223131 has 4 divisors (see below), whose sum is σ = 213347421000. Its totient is φ = 213299025264.

The previous prime is 213323223097. The next prime is 213323223137. The reversal of 213323223131 is 131322323312.

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-213323223131 is a prime.

It is a super-2 number, since 2×213323223131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213323223131.

It is not an unprimeable number, because it can be changed into a prime (213323223137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12085706 + ... + 12103343.

It is an arithmetic number, because the mean of its divisors is an integer number (53336855250).

Almost surely, 2^213323223131 is an apocalyptic number.

213323223131 is a deficient number, since it is larger than the sum of its proper divisors (24197869).

213323223131 is an equidigital number, since it uses as much as digits as its factorization.

213323223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24197868.

The product of its digits is 3888, while the sum is 26.

Adding to 213323223131 its reverse (131322323312), we get a palindrome (344645546443).

The spelling of 213323223131 in words is "two hundred thirteen billion, three hundred twenty-three million, two hundred twenty-three thousand, one hundred thirty-one".