216205630417241 has 4 divisors (see below), whose sum is σ = 216267991433232. Its totient is φ = 216143269401252.

The previous prime is 216205630417169. The next prime is 216205630417243. The reversal of 216205630417241 is 142714036502612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216205630417241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216205630417192 and 216205630417201.

It is not an unprimeable number, because it can be changed into a prime (216205630417243) 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 3 ways as a sum of consecutive naturals, for example, 31180502795 + ... + 31180509728.

It is an arithmetic number, because the mean of its divisors is an integer number (54066997858308).

Almost surely, 2^{216205630417241} is an apocalyptic number.

It is an amenable number.

216205630417241 is a deficient number, since it is larger than the sum of its proper divisors (62361015991).

216205630417241 is an equidigital number, since it uses as much as digits as its factorization.

216205630417241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62361015990.

The product of its (nonzero) digits is 483840, while the sum is 44.

Adding to 216205630417241 its reverse (142714036502612), we get a palindrome (358919666919853).

The spelling of 216205630417241 in words is "two hundred sixteen trillion, two hundred five billion, six hundred thirty million, four hundred seventeen thousand, two hundred forty-one".