343491331100321 has 4 divisors (see below), whose sum is σ = 345998567093892. Its totient is φ = 340984095106752.

The previous prime is 343491331100311. The next prime is 343491331100341. The reversal of 343491331100321 is 123001133194343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 269439093160000 + 74052237940321 = 16414600^2 + 8605361^2 .

It is a cyclic number.

It is not a de Polignac number, because 343491331100321 - 2⁴² = 339093284589217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (343491331100311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253617996580 + ... + 1253617996853.

It is an arithmetic number, because the mean of its divisors is an integer number (86499641773473).

Almost surely, 2^{343491331100321} is an apocalyptic number.

It is an amenable number.

343491331100321 is a deficient number, since it is larger than the sum of its proper divisors (2507235993571).

343491331100321 is a wasteful number, since it uses less digits than its factorization.

343491331100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507235993570.

The product of its (nonzero) digits is 69984, while the sum is 38.

Adding to 343491331100321 its reverse (123001133194343), we get a palindrome (466492464294664).

The spelling of 343491331100321 in words is "three hundred forty-three trillion, four hundred ninety-one billion, three hundred thirty-one million, one hundred thousand, three hundred twenty-one".