1340444303213 has 4 divisors (see below), whose sum is σ = 1373138066748. Its totient is φ = 1307750539680.

The previous prime is 1340444303137. The next prime is 1340444303221. The reversal of 1340444303213 is 3123034440431.

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 749701417609 + 590742885604 = 865853^2 + 768598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340444303213 - 2³⁴ = 1323264434029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340444303213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340444303413) 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, 16346881706 + ... + 16346881787.

It is an arithmetic number, because the mean of its divisors is an integer number (343284516687).

Almost surely, 2^{1340444303213} is an apocalyptic number.

It is an amenable number.

1340444303213 is a deficient number, since it is larger than the sum of its proper divisors (32693763535).

1340444303213 is an equidigital number, since it uses as much as digits as its factorization.

1340444303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32693763534.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 1340444303213 its reverse (3123034440431), we get a palindrome (4463478743644).

The spelling of 1340444303213 in words is "one trillion, three hundred forty billion, four hundred forty-four million, three hundred three thousand, two hundred thirteen".