215221620652 has 6 divisors (see below), whose sum is σ = 376637836148. Its totient is φ = 107610810324.

The previous prime is 215221620617. The next prime is 215221620689. The reversal of 215221620652 is 256026122512.

215221620652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26902702578 + ... + 26902702585.

Almost surely, 2^215221620652 is an apocalyptic number.

It is an amenable number.

215221620652 is a deficient number, since it is larger than the sum of its proper divisors (161416215496).

215221620652 is a wasteful number, since it uses less digits than its factorization.

215221620652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53805405167 (or 53805405165 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 215221620652 in words is "two hundred fifteen billion, two hundred twenty-one million, six hundred twenty thousand, six hundred fifty-two".