213443330417 has 2 divisors, whose sum is σ = 213443330418. Its totient is φ = 213443330416.

The previous prime is 213443330407. The next prime is 213443330483. The reversal of 213443330417 is 714033344312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120217532176 + 93225798241 = 346724^2 + 305329^2 .

It is a cyclic number.

It is not a de Polignac number, because 213443330417 - 2²⁰ = 213442281841 is a prime.

It is not a weakly prime, because it can be changed into another prime (213443330407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721665208 + 106721665209.

It is an arithmetic number, because the mean of its divisors is an integer number (106721665209).

Almost surely, 2^213443330417 is an apocalyptic number.

It is an amenable number.

213443330417 is a deficient number, since it is larger than the sum of its proper divisors (1).

213443330417 is an equidigital number, since it uses as much as digits as its factorization.

213443330417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 35.

Adding to 213443330417 its reverse (714033344312), we get a palindrome (927476674729).

The spelling of 213443330417 in words is "two hundred thirteen billion, four hundred forty-three million, three hundred thirty thousand, four hundred seventeen".