2215723015728 has 120 divisors (see below), whose sum is σ = 6585193909008. Its totient is φ = 693065834496.

The previous prime is 2215723015703. The next prime is 2215723015733. The reversal of 2215723015728 is 8275103275122.

It is a happy number.

2215723015728 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 72 + 3 + 0 + 1 + 572 + 8 = 666.

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 23 ways as a sum of consecutive naturals, for example, 517926 + ... + 2167877.

Almost surely, 2^{2215723015728} is an apocalyptic number.

It is an amenable number.

2215723015728 is an abundant number, since it is smaller than the sum of its proper divisors (4369470893280).

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

2215723015728 is a wasteful number, since it uses less digits than its factorization.

2215723015728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686171 (or 2686162 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 2215723015728 in words is "two trillion, two hundred fifteen billion, seven hundred twenty-three million, fifteen thousand, seven hundred twenty-eight".