3221771904 has 192 divisors, whose sum is σ = 10218368160. Its totient is φ = 968067072.

The previous prime is 3221771893. The next prime is 3221771909. The reversal of 3221771904 is 4091771223.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3221771909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 641467 + ... + 646469.

Almost surely, 2^3221771904 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 3221771904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5109184080).

3221771904 is an abundant number, since it is smaller than the sum of its proper divisors (6996596256).

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

3221771904 is a wasteful number, since it uses less digits than its factorization.

3221771904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079 (or 5064 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 3221771904 is about 56760.6545416805. The cubic root of 3221771904 is about 1476.9470644341.

The spelling of 3221771904 in words is "three billion, two hundred twenty-one million, seven hundred seventy-one thousand, nine hundred four".