1440221013 has 96 divisors (see below), whose sum is σ = 2721116160. Its totient is φ = 736797600.

The previous prime is 1440220987. The next prime is 1440221017. The reversal of 1440221013 is 3101220441.

1440221013 is a `hidden beast` number, since 1 + 440 + 2 + 210 + 13 = 666.

It is not a de Polignac number, because 1440221013 - 2⁶ = 1440220949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440221017) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1623256 + ... + 1624142.

It is an arithmetic number, because the mean of its divisors is an integer number (28344960).

Almost surely, 2^1440221013 is an apocalyptic number.

It is an amenable number.

1440221013 is a deficient number, since it is larger than the sum of its proper divisors (1280895147).

1440221013 is a wasteful number, since it uses less digits than its factorization.

1440221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1440221013 is about 37950.2439122596. The cubic root of 1440221013 is about 1129.3010042562.

Adding to 1440221013 its reverse (3101220441), we get a palindrome (4541441454).

The spelling of 1440221013 in words is "one billion, four hundred forty million, two hundred twenty-one thousand, thirteen".