1305643223343 has 4 divisors (see below), whose sum is σ = 1740857631128. Its totient is φ = 870428815560.

The previous prime is 1305643223279. The next prime is 1305643223351. The reversal of 1305643223343 is 3433223465031.

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

It is not a de Polignac number, because 1305643223343 - 2⁶ = 1305643223279 is a prime.

It is a super-2 number, since 2×1305643223343² (a number of 25 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 (1305643223243) 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, 217607203888 + ... + 217607203893.

It is an arithmetic number, because the mean of its divisors is an integer number (435214407782).

Almost surely, 2^{1305643223343} is an apocalyptic number.

1305643223343 is a deficient number, since it is larger than the sum of its proper divisors (435214407785).

1305643223343 is an equidigital number, since it uses as much as digits as its factorization.

1305643223343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435214407784.

The product of its (nonzero) digits is 466560, while the sum is 39.

Adding to 1305643223343 its reverse (3433223465031), we get a palindrome (4738866688374).

The spelling of 1305643223343 in words is "one trillion, three hundred five billion, six hundred forty-three million, two hundred twenty-three thousand, three hundred forty-three".