216015254243 has 4 divisors (see below), whose sum is σ = 217465021200. Its totient is φ = 214565487288.

The previous prime is 216015254239. The next prime is 216015254249. The reversal of 216015254243 is 342452510612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216015254243 - 2² = 216015254239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216015254249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724883255 + ... + 724883552.

It is an arithmetic number, because the mean of its divisors is an integer number (54366255300).

Almost surely, 2^216015254243 is an apocalyptic number.

216015254243 is a deficient number, since it is larger than the sum of its proper divisors (1449766957).

216015254243 is a wasteful number, since it uses less digits than its factorization.

216015254243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449766956.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 216015254243 its reverse (342452510612), we get a palindrome (558467764855).

The spelling of 216015254243 in words is "two hundred sixteen billion, fifteen million, two hundred fifty-four thousand, two hundred forty-three".