345523219999 has 4 divisors (see below), whose sum is σ = 345527171064. Its totient is φ = 345519268936.

The previous prime is 345523219957. The next prime is 345523220047. The reversal of 345523219999 is 999912325543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999912325543 = 599699 ⋅1667357.

It is a cyclic number.

It is not a de Polignac number, because 345523219999 - 2²⁵ = 345489665567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345523219949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841317 + ... + 2020270.

It is an arithmetic number, because the mean of its divisors is an integer number (86381792766).

Almost surely, 2^345523219999 is an apocalyptic number.

345523219999 is a deficient number, since it is larger than the sum of its proper divisors (3951065).

345523219999 is an equidigital number, since it uses as much as digits as its factorization.

345523219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951064.

The product of its digits is 23619600, while the sum is 61.

The spelling of 345523219999 in words is "three hundred forty-five billion, five hundred twenty-three million, two hundred nineteen thousand, nine hundred ninety-nine".