215503430243 has 16 divisors (see below), whose sum is σ = 226276601760. Its totient is φ = 204976262400.

The previous prime is 215503430231. The next prime is 215503430281. The reversal of 215503430243 is 342034305512.

It is a cyclic number.

It is not a de Polignac number, because 215503430243 - 2⁴ = 215503430227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215503430843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313433 + ... + 727493.

It is an arithmetic number, because the mean of its divisors is an integer number (14142287610).

Almost surely, 2^215503430243 is an apocalyptic number.

215503430243 is a deficient number, since it is larger than the sum of its proper divisors (10773171517).

215503430243 is a wasteful number, since it uses less digits than its factorization.

215503430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414358.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 215503430243 its reverse (342034305512), we get a palindrome (557537735755).

The spelling of 215503430243 in words is "two hundred fifteen billion, five hundred three million, four hundred thirty thousand, two hundred forty-three".