1440113231431 has 4 divisors (see below), whose sum is σ = 1645843693072. Its totient is φ = 1234382769792.

The previous prime is 1440113231429. The next prime is 1440113231437. The reversal of 1440113231431 is 1341323110441.

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 1440113231431 - 2¹ = 1440113231429 is a prime.

It is a super-2 number, since 2×1440113231431² (a number of 25 digits) contains 22 as substring.

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 1440113231431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440113231437) 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, 102865230810 + ... + 102865230823.

It is an arithmetic number, because the mean of its divisors is an integer number (411460923268).

Almost surely, 2^{1440113231431} is an apocalyptic number.

1440113231431 is a deficient number, since it is larger than the sum of its proper divisors (205730461641).

1440113231431 is an equidigital number, since it uses as much as digits as its factorization.

1440113231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205730461640.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 1440113231431 its reverse (1341323110441), we get a palindrome (2781436341872).

The spelling of 1440113231431 in words is "one trillion, four hundred forty billion, one hundred thirteen million, two hundred thirty-one thousand, four hundred thirty-one".