213213431447 has 2 divisors, whose sum is σ = 213213431448. Its totient is φ = 213213431446.

The previous prime is 213213431441. The next prime is 213213431489. The reversal of 213213431447 is 744134312312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213213431447 - 2¹² = 213213427351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213213431441) 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, 106606715723 + 106606715724.

It is an arithmetic number, because the mean of its divisors is an integer number (106606715724).

Almost surely, 2^213213431447 is an apocalyptic number.

213213431447 is a deficient number, since it is larger than the sum of its proper divisors (1).

213213431447 is an equidigital number, since it uses as much as digits as its factorization.

213213431447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

Adding to 213213431447 its reverse (744134312312), we get a palindrome (957347743759).

The spelling of 213213431447 in words is "two hundred thirteen billion, two hundred thirteen million, four hundred thirty-one thousand, four hundred forty-seven".