1440231013 has 12 divisors (see below), whose sum is σ = 1574999748. Its totient is φ = 1316265600.

The previous prime is 1440230993. The next prime is 1440231029. The reversal of 1440231013 is 3101320441.

It can be written as a sum of positive squares in 6 ways, for example, as 10029889 + 1430201124 = 3167^2 + 37818^2 .

It is not a de Polignac number, because 1440231013 - 2⁹ = 1440230501 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 (1440231053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25120 + ... + 59257.

It is an arithmetic number, because the mean of its divisors is an integer number (131249979).

Almost surely, 2^1440231013 is an apocalyptic number.

1440231013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1440231013 is a deficient number, since it is larger than the sum of its proper divisors (134768735).

1440231013 is a wasteful number, since it uses less digits than its factorization.

1440231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84504 (or 84491 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1440231013 is about 37950.3756634898. The cubic root of 1440231013 is about 1129.3036179717.

Adding to 1440231013 its reverse (3101320441), we get a palindrome (4541551454).

The spelling of 1440231013 in words is "one billion, four hundred forty million, two hundred thirty-one thousand, thirteen".