344404003213 has 4 divisors (see below), whose sum is σ = 344509749180. Its totient is φ = 344298257248.

The previous prime is 344404003157. The next prime is 344404003247. The reversal of 344404003213 is 312300404443.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312300404443 = 131 ⋅2383972553.

It can be written as a sum of positive squares in 2 ways, for example, as 269482459689 + 74921543524 = 519117^2 + 273718^2 .

It is a cyclic number.

It is not a de Polignac number, because 344404003213 - 2²¹ = 344401906061 is a prime.

It is a super-2 number, since 2×344404003213² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344404003613) 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, 52868098 + ... + 52874611.

It is an arithmetic number, because the mean of its divisors is an integer number (86127437295).

Almost surely, 2^344404003213 is an apocalyptic number.

It is an amenable number.

344404003213 is a deficient number, since it is larger than the sum of its proper divisors (105745967).

344404003213 is a wasteful number, since it uses less digits than its factorization.

344404003213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105745966.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 344404003213 its reverse (312300404443), we get a palindrome (656704407656).

The spelling of 344404003213 in words is "three hundred forty-four billion, four hundred four million, three thousand, two hundred thirteen".