215345503555 has 96 divisors (see below), whose sum is σ = 332146241280. Its totient is φ = 132772792320.

The previous prime is 215345503547. The next prime is 215345503559. The reversal of 215345503555 is 555305543512.

215345503555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215345503555 - 2³ = 215345503547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215345503559) by changing a digit.

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 in 95 ways as a sum of consecutive naturals, for example, 144818022 + ... + 144819508.

It is an arithmetic number, because the mean of its divisors is an integer number (3459856680).

Almost surely, 2^215345503555 is an apocalyptic number.

215345503555 is a deficient number, since it is larger than the sum of its proper divisors (116800737725).

215345503555 is a wasteful number, since it uses less digits than its factorization.

215345503555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 43.

The spelling of 215345503555 in words is "two hundred fifteen billion, three hundred forty-five million, five hundred three thousand, five hundred fifty-five".