345122311 has 2 divisors, whose sum is σ = 345122312. Its totient is φ = 345122310.

The previous prime is 345122303. The next prime is 345122341. The reversal of 345122311 is 113221543.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345122311 - 2³ = 345122303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345122341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172561155 + 172561156.

It is an arithmetic number, because the mean of its divisors is an integer number (172561156).

Almost surely, 2^345122311 is an apocalyptic number.

345122311 is a deficient number, since it is larger than the sum of its proper divisors (1).

345122311 is an equidigital number, since it uses as much as digits as its factorization.

345122311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 345122311 is about 18577.4678306813. The cubic root of 345122311 is about 701.4407814433.

Adding to 345122311 its reverse (113221543), we get a palindrome (458343854).

The spelling of 345122311 in words is "three hundred forty-five million, one hundred twenty-two thousand, three hundred eleven".