216538230 has 16 divisors (see below), whose sum is σ = 519691824. Its totient is φ = 57743520.

The previous prime is 216538229. The next prime is 216538237. The reversal of 216538230 is 32835612.

216538230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7217941 = 216538230 / (2 + 1 + 6 + 5 + 3 + 8 + 2 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216538237) 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, 3608941 + ... + 3609000.

It is an arithmetic number, because the mean of its divisors is an integer number (32480739).

Almost surely, 2^216538230 is an apocalyptic number.

216538230 is an abundant number, since it is smaller than the sum of its proper divisors (303153594).

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

216538230 is a wasteful number, since it uses less digits than its factorization.

216538230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7217951.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 216538230 is about 14715.2380205011. The cubic root of 216538230 is about 600.4979477435.

The spelling of 216538230 in words is "two hundred sixteen million, five hundred thirty-eight thousand, two hundred thirty".