161002216 has 16 divisors (see below), whose sum is σ = 302027040. Its totient is φ = 80461680.

The previous prime is 161002211. The next prime is 161002271. The reversal of 161002216 is 612200161.

It is a junction number, because it is equal to n+sod(n) for n = 161002193 and 161002202.

It is not an unprimeable number, because it can be changed into a prime (161002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19611 + ... + 26581.

It is an arithmetic number, because the mean of its divisors is an integer number (18876690).

Almost surely, 2^161002216 is an apocalyptic number.

It is an amenable number.

161002216 is a deficient number, since it is larger than the sum of its proper divisors (141024824).

161002216 is a wasteful number, since it uses less digits than its factorization.

161002216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9864 (or 9860 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 161002216 is about 12688.6648627821. The cubic root of 161002216 is about 544.0146784534.

Adding to 161002216 its reverse (612200161), we get a palindrome (773202377).

The spelling of 161002216 in words is "one hundred sixty-one million, two thousand, two hundred sixteen".