213443344273 has 2 divisors, whose sum is σ = 213443344274. Its totient is φ = 213443344272.

The previous prime is 213443344267. The next prime is 213443344381. The reversal of 213443344273 is 372443344312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175265310609 + 38178033664 = 418647^2 + 195392^2 .

It is a cyclic number.

It is not a de Polignac number, because 213443344273 - 2⁹ = 213443343761 is a prime.

It is a super-2 number, since 2×213443344273² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213443344973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721672136 + 106721672137.

It is an arithmetic number, because the mean of its divisors is an integer number (106721672137).

Almost surely, 2^213443344273 is an apocalyptic number.

It is an amenable number.

213443344273 is a deficient number, since it is larger than the sum of its proper divisors (1).

213443344273 is an equidigital number, since it uses as much as digits as its factorization.

213443344273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 40.

Adding to 213443344273 its reverse (372443344312), we get a palindrome (585886688585).

The spelling of 213443344273 in words is "two hundred thirteen billion, four hundred forty-three million, three hundred forty-four thousand, two hundred seventy-three".