215331633128 has 16 divisors (see below), whose sum is σ = 408283294500. Its totient is φ = 106456087936.

The previous prime is 215331633089. The next prime is 215331633151. The reversal of 215331633128 is 821336133512.

215331633128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 215242179364 + 89453764 = 463942^2 + 9458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215331633091 and 215331633100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151215323 + ... + 151216746.

Almost surely, 2^215331633128 is an apocalyptic number.

It is an amenable number.

215331633128 is a deficient number, since it is larger than the sum of its proper divisors (192951661372).

215331633128 is a wasteful number, since it uses less digits than its factorization.

215331633128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302432164 (or 302432160 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The spelling of 215331633128 in words is "two hundred fifteen billion, three hundred thirty-one million, six hundred thirty-three thousand, one hundred twenty-eight".