345213220217 has 2 divisors, whose sum is σ = 345213220218. Its totient is φ = 345213220216.

The previous prime is 345213220213. The next prime is 345213220229. The reversal of 345213220217 is 712022312543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310548738361 + 34664481856 = 557269^2 + 186184^2 .

It is an emirp because it is prime and its reverse (712022312543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345213220217 - 2² = 345213220213 is a prime.

It is not a weakly prime, because it can be changed into another prime (345213220213) 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, 172606610108 + 172606610109.

It is an arithmetic number, because the mean of its divisors is an integer number (172606610109).

Almost surely, 2^345213220217 is an apocalyptic number.

It is an amenable number.

345213220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

345213220217 is an equidigital number, since it uses as much as digits as its factorization.

345213220217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 345213220217 in words is "three hundred forty-five billion, two hundred thirteen million, two hundred twenty thousand, two hundred seventeen".