161500216 has 8 divisors (see below), whose sum is σ = 302812920. Its totient is φ = 80750104.

The previous prime is 161500193. The next prime is 161500223. The reversal of 161500216 is 612005161.

161500216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10093756 + ... + 10093771.

It is an arithmetic number, because the mean of its divisors is an integer number (37851615).

Almost surely, 2^161500216 is an apocalyptic number.

It is an amenable number.

161500216 is a deficient number, since it is larger than the sum of its proper divisors (141312704).

161500216 is a wasteful number, since it uses less digits than its factorization.

161500216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20187533 (or 20187529 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 161500216 is about 12708.2735255423. The cubic root of 161500216 is about 544.5750029560.

Adding to 161500216 its reverse (612005161), we get a palindrome (773505377).

The spelling of 161500216 in words is "one hundred sixty-one million, five hundred thousand, two hundred sixteen".