3221031440 has 160 divisors (see below), whose sum is σ = 8557166592. Its totient is φ = 1116864000.

The previous prime is 3221031403. The next prime is 3221031461. The reversal of 3221031440 is 441301223.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1936049 + ... + 1937711.

Almost surely, 2^3221031440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4278583296).

3221031440 is an abundant number, since it is smaller than the sum of its proper divisors (5336135152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221031440 is a wasteful number, since it uses less digits than its factorization.

3221031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1783 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3221031440 is about 56754.1314795672. The cubic root of 3221031440 is about 1476.8339062138.

Adding to 3221031440 its reverse (441301223), we get a palindrome (3662332663).

The spelling of 3221031440 in words is "three billion, two hundred twenty-one million, thirty-one thousand, four hundred forty".