3215205056 has 56 divisors (see below), whose sum is σ = 7305019680. Its totient is φ = 1375414272.

The previous prime is 3215205017. The next prime is 3215205067. The reversal of 3215205056 is 6505025123.

It is a happy number.

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

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, 248606 + ... + 261218.

It is an arithmetic number, because the mean of its divisors is an integer number (130446780).

Almost surely, 2^3215205056 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 3215205056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3652509840).

3215205056 is an abundant number, since it is smaller than the sum of its proper divisors (4089814624).

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

3215205056 is a wasteful number, since it uses less digits than its factorization.

3215205056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13201 (or 13191 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 3215205056 is about 56702.7782035413. The cubic root of 3215205056 is about 1475.9429085126.

The spelling of 3215205056 in words is "three billion, two hundred fifteen million, two hundred five thousand, fifty-six".