213223223231 has 16 divisors (see below), whose sum is σ = 233576187840. Its totient is φ = 193739589120.

The previous prime is 213223223209. The next prime is 213223223237. The reversal of 213223223231 is 132322322312.

It is a cyclic number.

It is not a de Polignac number, because 213223223231 - 2⁶ = 213223223167 is a prime.

It is a super-2 number, since 2×213223223231² (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 213223223231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213223223237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6165470 + ... + 6199956.

It is an arithmetic number, because the mean of its divisors is an integer number (14598511740).

Almost surely, 2^213223223231 is an apocalyptic number.

213223223231 is a deficient number, since it is larger than the sum of its proper divisors (20352964609).

213223223231 is a wasteful number, since it uses less digits than its factorization.

213223223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47074.

The product of its digits is 5184, while the sum is 26.

Adding to 213223223231 its reverse (132322322312), we get a palindrome (345545545543).

The spelling of 213223223231 in words is "two hundred thirteen billion, two hundred twenty-three million, two hundred twenty-three thousand, two hundred thirty-one".