3216545472 has 56 divisors (see below), whose sum is σ = 9726224896. Its totient is φ = 919012608.

The previous prime is 3216545467. The next prime is 3216545509. The reversal of 3216545472 is 2745456123.

It is a tau number, because it is divible by the number of its divisors (56).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 3216545472.

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 7 ways as a sum of consecutive naturals, for example, 1195288 + ... + 1197975.

Almost surely, 2^3216545472 is an apocalyptic number.

3216545472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3216545472 is an abundant number, since it is smaller than the sum of its proper divisors (6509679424).

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

3216545472 is a wasteful number, since it uses less digits than its factorization.

3216545472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393285 (or 2393275 counting only the distinct ones).

The product of its digits is 201600, while the sum is 39.

The square root of 3216545472 is about 56714.5966396659. The cubic root of 3216545472 is about 1476.1479864253.

The spelling of 3216545472 in words is "three billion, two hundred sixteen million, five hundred forty-five thousand, four hundred seventy-two".