2215351728 has 80 divisors (see below), whose sum is σ = 6378168160. Its totient is φ = 736210944.

The previous prime is 2215351709. The next prime is 2215351741. The reversal of 2215351728 is 8271535122.

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

It is a junction number, because it is equal to n+sod(n) for n = 2215351692 and 2215351701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137976 + ... + 153192.

It is an arithmetic number, because the mean of its divisors is an integer number (79727102).

Almost surely, 2^2215351728 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 2215351728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3189084080).

2215351728 is an abundant number, since it is smaller than the sum of its proper divisors (4162816432).

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

2215351728 is a wasteful number, since it uses less digits than its factorization.

2215351728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15571 (or 15559 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 2215351728 is about 47067.5230705845. The cubic root of 2215351728 is about 1303.6096382571.

The spelling of 2215351728 in words is "two billion, two hundred fifteen million, three hundred fifty-one thousand, seven hundred twenty-eight".