3221021240 has 32 divisors (see below), whose sum is σ = 7251979680. Its totient is φ = 1287576192.

The previous prime is 3221021239. The next prime is 3221021257. The reversal of 3221021240 is 421201223.

It is a super-2 number, since 2×3221021240² = 20749955657062275200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38669 + ... + 89091.

It is an arithmetic number, because the mean of its divisors is an integer number (226624365).

Almost surely, 2^3221021240 is an apocalyptic number.

It is an amenable number.

3221021240 is an abundant number, since it is smaller than the sum of its proper divisors (4030958440).

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

3221021240 is a wasteful number, since it uses less digits than its factorization.

3221021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52031 (or 52027 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 3221021240 is about 56754.0416181967. The cubic root of 3221021240 is about 1476.8323473216.

Adding to 3221021240 its reverse (421201223), we get a palindrome (3642222463).

The spelling of 3221021240 in words is "three billion, two hundred twenty-one million, twenty-one thousand, two hundred forty".