1340144432243 has 4 divisors (see below), whose sum is σ = 1340600421720. Its totient is φ = 1339688442768.

The previous prime is 1340144432227. The next prime is 1340144432257. The reversal of 1340144432243 is 3422344410431.

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

It is a cyclic number.

It is not a de Polignac number, because 1340144432243 - 2⁴ = 1340144432227 is a prime.

It is a super-2 number, since 2×1340144432243² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340144431243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227990330 + ... + 227996207.

It is an arithmetic number, because the mean of its divisors is an integer number (335150105430).

Almost surely, 2^{1340144432243} is an apocalyptic number.

1340144432243 is a deficient number, since it is larger than the sum of its proper divisors (455989477).

1340144432243 is an equidigital number, since it uses as much as digits as its factorization.

1340144432243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455989476.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 1340144432243 its reverse (3422344410431), we get a palindrome (4762488842674).

The spelling of 1340144432243 in words is "one trillion, three hundred forty billion, one hundred forty-four million, four hundred thirty-two thousand, two hundred forty-three".