1440242423531 has 4 divisors (see below), whose sum is σ = 1440249425064. Its totient is φ = 1440235422000.

The previous prime is 1440242423509. The next prime is 1440242423533. The reversal of 1440242423531 is 1353242420441.

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 1440242423531 - 2¹⁴ = 1440242407147 is a prime.

It is a super-2 number, since 2×1440242423531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440242423491 and 1440242423500.

It is not an unprimeable number, because it can be changed into a prime (1440242423533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3182570 + ... + 3606831.

It is an arithmetic number, because the mean of its divisors is an integer number (360062356266).

Almost surely, 2^{1440242423531} is an apocalyptic number.

1440242423531 is a deficient number, since it is larger than the sum of its proper divisors (7001533).

1440242423531 is an equidigital number, since it uses as much as digits as its factorization.

1440242423531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001532.

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 1440242423531 its reverse (1353242420441), we get a palindrome (2793484843972).

The spelling of 1440242423531 in words is "one trillion, four hundred forty billion, two hundred forty-two million, four hundred twenty-three thousand, five hundred thirty-one".