221605160847 has 12 divisors (see below), whose sum is σ = 343714127256. Its totient is φ = 126631520400.

The previous prime is 221605160831. The next prime is 221605160867. The reversal of 221605160847 is 748061506122.

It is a happy number.

It is not a de Polignac number, because 221605160847 - 2⁴ = 221605160831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221605160799 and 221605160808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221605160867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753758904 + ... + 753759197.

It is an arithmetic number, because the mean of its divisors is an integer number (28642843938).

Almost surely, 2^221605160847 is an apocalyptic number.

221605160847 is a deficient number, since it is larger than the sum of its proper divisors (122108966409).

221605160847 is a wasteful number, since it uses less digits than its factorization.

221605160847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507518118 (or 1507518111 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

Adding to 221605160847 its reverse (748061506122), we get a palindrome (969666666969).

The spelling of 221605160847 in words is "two hundred twenty-one billion, six hundred five million, one hundred sixty thousand, eight hundred forty-seven".