213231442231 has 8 divisors (see below), whose sum is σ = 215349473664. Its totient is φ = 211114330680.

The previous prime is 213231442199. The next prime is 213231442247. The reversal of 213231442231 is 132244132312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213231442231 - 2⁵ = 213231442199 is a prime.

It is a super-2 number, since 2×213231442231² (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 213231442231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213231442331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240696 + ... + 695986.

It is an arithmetic number, because the mean of its divisors is an integer number (26918684208).

Almost surely, 2^213231442231 is an apocalyptic number.

213231442231 is a deficient number, since it is larger than the sum of its proper divisors (2118031433).

213231442231 is a wasteful number, since it uses less digits than its factorization.

213231442231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459941.

The product of its digits is 6912, while the sum is 28.

Adding to 213231442231 its reverse (132244132312), we get a palindrome (345475574543).

The spelling of 213231442231 in words is "two hundred thirteen billion, two hundred thirty-one million, four hundred forty-two thousand, two hundred thirty-one".