1440313321 has 8 divisors (see below), whose sum is σ = 1529068320. Its totient is φ = 1352006208.

The previous prime is 1440313307. The next prime is 1440313331. The reversal of 1440313321 is 1233130441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1440313321 - 2¹³ = 1440305129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440313292 and 1440313301.

It is not an unprimeable number, because it can be changed into a prime (1440313331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105331 + ... + 118216.

It is an arithmetic number, because the mean of its divisors is an integer number (191133540).

Almost surely, 2^1440313321 is an apocalyptic number.

It is an amenable number.

1440313321 is a deficient number, since it is larger than the sum of its proper divisors (88754999).

1440313321 is a wasteful number, since it uses less digits than its factorization.

1440313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223943.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1440313321 is about 37951.4600641398. The cubic root of 1440313321 is about 1129.3251304816.

Adding to 1440313321 its reverse (1233130441), we get a palindrome (2673443762).

The spelling of 1440313321 in words is "one billion, four hundred forty million, three hundred thirteen thousand, three hundred twenty-one".