343146845221 has 2 divisors, whose sum is σ = 343146845222. Its totient is φ = 343146845220.

The previous prime is 343146845161. The next prime is 343146845309. The reversal of 343146845221 is 122548641343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338805484900 + 4341360321 = 582070^2 + 65889^2 .

It is a cyclic number.

It is not a de Polignac number, because 343146845221 - 2¹³ = 343146837029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343144845221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171573422610 + 171573422611.

It is an arithmetic number, because the mean of its divisors is an integer number (171573422611).

Almost surely, 2^343146845221 is an apocalyptic number.

It is an amenable number.

343146845221 is a deficient number, since it is larger than the sum of its proper divisors (1).

343146845221 is an equidigital number, since it uses as much as digits as its factorization.

343146845221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 43.

The spelling of 343146845221 in words is "three hundred forty-three billion, one hundred forty-six million, eight hundred forty-five thousand, two hundred twenty-one".