345182518321 has 2 divisors, whose sum is σ = 345182518322. Its totient is φ = 345182518320.

The previous prime is 345182518319. The next prime is 345182518339. The reversal of 345182518321 is 123815281543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185038485921 + 160144032400 = 430161^2 + 400180^2 .

It is a cyclic number.

It is not a de Polignac number, because 345182518321 - 2¹ = 345182518319 is a prime.

Together with 345182518319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (345182518301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172591259160 + 172591259161.

It is an arithmetic number, because the mean of its divisors is an integer number (172591259161).

Almost surely, 2^345182518321 is an apocalyptic number.

It is an amenable number.

345182518321 is a deficient number, since it is larger than the sum of its proper divisors (1).

345182518321 is an equidigital number, since it uses as much as digits as its factorization.

345182518321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 43.

Adding to 345182518321 its reverse (123815281543), we get a palindrome (468997799864).

The spelling of 345182518321 in words is "three hundred forty-five billion, one hundred eighty-two million, five hundred eighteen thousand, three hundred twenty-one".