1440223420213 has 4 divisors (see below), whose sum is σ = 1475350820748. Its totient is φ = 1405096019680.

The previous prime is 1440223420199. The next prime is 1440223420219. The reversal of 1440223420213 is 3120243220441.

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 717439492324 + 722783927889 = 847018^2 + 850167^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440223420213 - 2¹³ = 1440223412021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440223420219) 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, 17563700206 + ... + 17563700287.

It is an arithmetic number, because the mean of its divisors is an integer number (368837705187).

Almost surely, 2^{1440223420213} is an apocalyptic number.

It is an amenable number.

1440223420213 is a deficient number, since it is larger than the sum of its proper divisors (35127400535).

1440223420213 is an equidigital number, since it uses as much as digits as its factorization.

1440223420213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35127400534.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1440223420213 its reverse (3120243220441), we get a palindrome (4560466640654).

The spelling of 1440223420213 in words is "one trillion, four hundred forty billion, two hundred twenty-three million, four hundred twenty thousand, two hundred thirteen".