3221451072 has 168 divisors, whose sum is σ = 10656637056. Its totient is φ = 911361024.

The previous prime is 3221451067. The next prime is 3221451089. The reversal of 3221451072 is 2701541223.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411418 + ... + 419174.

Almost surely, 2^3221451072 is an apocalyptic number.

3221451072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221451072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5328318528).

3221451072 is an abundant number, since it is smaller than the sum of its proper divisors (7435185984).

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

3221451072 is a wasteful number, since it uses less digits than its factorization.

3221451072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885 (or 7872 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 3221451072 is about 56757.8282882635. The cubic root of 3221451072 is about 1476.8980367950.

Adding to 3221451072 its reverse (2701541223), we get a palindrome (5922992295).

The spelling of 3221451072 in words is "three billion, two hundred twenty-one million, four hundred fifty-one thousand, seventy-two".