213815481611 has 2 divisors, whose sum is σ = 213815481612. Its totient is φ = 213815481610.

The previous prime is 213815481533. The next prime is 213815481613. The reversal of 213815481611 is 116184518312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213815481611 is a prime.

Together with 213815481613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213815481613) 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 as a sum of consecutive naturals, namely, 106907740805 + 106907740806.

It is an arithmetic number, because the mean of its divisors is an integer number (106907740806).

Almost surely, 2^213815481611 is an apocalyptic number.

213815481611 is a deficient number, since it is larger than the sum of its proper divisors (1).

213815481611 is an equidigital number, since it uses as much as digits as its factorization.

213815481611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 41.

Adding to 213815481611 its reverse (116184518312), we get a palindrome (329999999923).

The spelling of 213815481611 in words is "two hundred thirteen billion, eight hundred fifteen million, four hundred eighty-one thousand, six hundred eleven".