216265530 has 32 divisors (see below), whose sum is σ = 558964224. Its totient is φ = 53234496.

The previous prime is 216265523. The next prime is 216265531. The reversal of 216265530 is 35562612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (216265531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276874 + ... + 277653.

It is an arithmetic number, because the mean of its divisors is an integer number (17467632).

Almost surely, 2^216265530 is an apocalyptic number.

216265530 is an abundant number, since it is smaller than the sum of its proper divisors (342698694).

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

216265530 is a wasteful number, since it uses less digits than its factorization.

216265530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554550.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 216265530 is about 14705.9691962142. The cubic root of 216265530 is about 600.2457604337.

The spelling of 216265530 in words is "two hundred sixteen million, two hundred sixty-five thousand, five hundred thirty".