221605161082 has 16 divisors (see below), whose sum is σ = 332748280872. Its totient is φ = 110689113600.

The previous prime is 221605161031. The next prime is 221605161103. The reversal of 221605161082 is 280161506122.

It is a happy number.

221605161082 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 119231399401 + 102373761681 = 345299^2 + 319959^2 .

It is an unprimeable number.

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, 13295698 + ... + 13312354.

Almost surely, 2^221605161082 is an apocalyptic number.

221605161082 is a deficient number, since it is larger than the sum of its proper divisors (111143119790).

221605161082 is a wasteful number, since it uses less digits than its factorization.

221605161082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23073.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 221605161082 in words is "two hundred twenty-one billion, six hundred five million, one hundred sixty-one thousand, eighty-two".