216161516 has 12 divisors (see below), whose sum is σ = 387080232. Its totient is φ = 105567168.

The previous prime is 216161503. The next prime is 216161527. The reversal of 216161516 is 615161612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628205 + ... + 628548.

It is an arithmetic number, because the mean of its divisors is an integer number (32256686).

Almost surely, 2^216161516 is an apocalyptic number.

It is an amenable number.

216161516 is a deficient number, since it is larger than the sum of its proper divisors (170918716).

216161516 is a wasteful number, since it uses less digits than its factorization.

216161516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256800 (or 1256798 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 216161516 is about 14702.4323157769. The cubic root of 216161516 is about 600.1495145911.

It can be divided in two parts, 21616 and 1516, that added together give a palindrome (23132).

The spelling of 216161516 in words is "two hundred sixteen million, one hundred sixty-one thousand, five hundred sixteen".