213111344231 has 8 divisors (see below), whose sum is σ = 217772929920. Its totient is φ = 208499615352.

The previous prime is 213111344207. The next prime is 213111344249. The reversal of 213111344231 is 132443111312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213111344231 is a prime.

It is a super-2 number, since 2×213111344231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213111344231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111344731) 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, 12455561 + ... + 12472658.

It is an arithmetic number, because the mean of its divisors is an integer number (27221616240).

Almost surely, 2^213111344231 is an apocalyptic number.

213111344231 is a deficient number, since it is larger than the sum of its proper divisors (4661585689).

213111344231 is a wasteful number, since it uses less digits than its factorization.

213111344231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24928405.

The product of its digits is 1728, while the sum is 26.

Adding to 213111344231 its reverse (132443111312), we get a palindrome (345554455543).

The spelling of 213111344231 in words is "two hundred thirteen billion, one hundred eleven million, three hundred forty-four thousand, two hundred thirty-one".