215503243355 has 32 divisors (see below), whose sum is σ = 267493682880. Its totient is φ = 166580305920.

The previous prime is 215503243349. The next prime is 215503243363. The reversal of 215503243355 is 553342305512.

It is not a de Polignac number, because 215503243355 - 2²⁶ = 215436134491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30533987 + ... + 30541043.

It is an arithmetic number, because the mean of its divisors is an integer number (8359177590).

Almost surely, 2^215503243355 is an apocalyptic number.

215503243355 is a deficient number, since it is larger than the sum of its proper divisors (51990439525).

215503243355 is a wasteful number, since it uses less digits than its factorization.

215503243355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8879.

The product of its (nonzero) digits is 270000, while the sum is 38.

Adding to 215503243355 its reverse (553342305512), we get a palindrome (768845548867).

The spelling of 215503243355 in words is "two hundred fifteen billion, five hundred three million, two hundred forty-three thousand, three hundred fifty-five".