213311143 has 2 divisors, whose sum is σ = 213311144. Its totient is φ = 213311142.

The previous prime is 213311113. The next prime is 213311159. The reversal of 213311143 is 341113312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213311143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213311113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106655571 + 106655572.

It is an arithmetic number, because the mean of its divisors is an integer number (106655572).

Almost surely, 2^213311143 is an apocalyptic number.

213311143 is a deficient number, since it is larger than the sum of its proper divisors (1).

213311143 is an equidigital number, since it uses as much as digits as its factorization.

213311143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 213311143 is about 14605.1752129168. The cubic root of 213311143 is about 597.4999146840.

Adding to 213311143 its reverse (341113312), we get a palindrome (554424455).

The spelling of 213311143 in words is "two hundred thirteen million, three hundred eleven thousand, one hundred forty-three".