216250313161 has 8 divisors (see below), whose sum is σ = 222806300744. Its totient is φ = 209791451520.

The previous prime is 216250313141. The next prime is 216250313173. The reversal of 216250313161 is 161313052612.

216250313161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 32826554761 + 183423758400 = 181181^2 + 428280^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216250313161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216250313141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24276966 + ... + 24285871.

It is an arithmetic number, because the mean of its divisors is an integer number (27850787593).

Almost surely, 2^216250313161 is an apocalyptic number.

It is an amenable number.

216250313161 is a deficient number, since it is larger than the sum of its proper divisors (6555987583).

216250313161 is an equidigital number, since it uses as much as digits as its factorization.

216250313161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48562971.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 216250313161 its reverse (161313052612), we get a palindrome (377563365773).

The spelling of 216250313161 in words is "two hundred sixteen billion, two hundred fifty million, three hundred thirteen thousand, one hundred sixty-one".