216342128 has 20 divisors (see below), whose sum is σ = 428082720. Its totient is φ = 105869184.

The previous prime is 216342121. The next prime is 216342169. The reversal of 216342128 is 821243612.

It is a happy number.

216342128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216342128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216342121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143093 + ... + 144596.

It is an arithmetic number, because the mean of its divisors is an integer number (21404136).

Almost surely, 2^216342128 is an apocalyptic number.

It is an amenable number.

216342128 is a deficient number, since it is larger than the sum of its proper divisors (211740592).

216342128 is a wasteful number, since it uses less digits than its factorization.

216342128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287744 (or 287738 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 216342128 is about 14708.5732822732. The cubic root of 216342128 is about 600.3166180775.

The spelling of 216342128 in words is "two hundred sixteen million, three hundred forty-two thousand, one hundred twenty-eight".