7215651712 has 64 divisors (see below), whose sum is σ = 14622136560. Its totient is φ = 3546132480.

The previous prime is 7215651659. The next prime is 7215651721. The reversal of 7215651712 is 2171565127.

It is a tau number, because it is divible by the number of its divisors (64).

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, 3091698 + ... + 3094030.

Almost surely, 2^7215651712 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 7215651712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7311068280).

7215651712 is an abundant number, since it is smaller than the sum of its proper divisors (7406484848).

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

7215651712 is a wasteful number, since it uses less digits than its factorization.

7215651712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2739 counting only the distinct ones).

The product of its digits is 29400, while the sum is 37.

The square root of 7215651712 is about 84944.9922714694. The cubic root of 7215651712 is about 1932.3769752213.

The spelling of 7215651712 in words is "seven billion, two hundred fifteen million, six hundred fifty-one thousand, seven hundred twelve".