216542052245 has 8 divisors (see below), whose sum is σ = 259853492184. Its totient is φ = 173231622144.

The previous prime is 216542052241. The next prime is 216542052329. The reversal of 216542052245 is 542250245612.

It can be written as a sum of positive squares in 4 ways, for example, as 55252263364 + 161289788881 = 235058^2 + 401609^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216542052245 - 2² = 216542052241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216542052199 and 216542052208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216542052241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349997 + ... + 745373.

It is an arithmetic number, because the mean of its divisors is an integer number (32481686523).

Almost surely, 2^216542052245 is an apocalyptic number.

It is an amenable number.

216542052245 is a deficient number, since it is larger than the sum of its proper divisors (43311439939).

216542052245 is a wasteful number, since it uses less digits than its factorization.

216542052245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504919.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 216542052245 its reverse (542250245612), we get a palindrome (758792297857).

The spelling of 216542052245 in words is "two hundred sixteen billion, five hundred forty-two million, fifty-two thousand, two hundred forty-five".