216302608172 has 24 divisors (see below), whose sum is σ = 432616394784. Its totient is φ = 92698722432.

The previous prime is 216302608157. The next prime is 216302608177. The reversal of 216302608172 is 271806203612.

It is a happy number.

It is a super-2 number, since 2×216302608172² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216302608177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1396928 + ... + 1544024.

It is an arithmetic number, because the mean of its divisors is an integer number (18025683116).

Almost surely, 2^216302608172 is an apocalyptic number.

It is an amenable number.

216302608172 is an abundant number, since it is smaller than the sum of its proper divisors (216313786612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216302608172 is a wasteful number, since it uses less digits than its factorization.

216302608172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199625 (or 199623 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 216302608172 in words is "two hundred sixteen billion, three hundred two million, six hundred eight thousand, one hundred seventy-two".