216345930 has 32 divisors (see below), whose sum is σ = 531897408. Its totient is φ = 56284800.

The previous prime is 216345929. The next prime is 216345937. The reversal of 216345930 is 39543612.

216345930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216345930² = 93611122855129800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216345891 and 216345900.

It is not an unprimeable number, because it can be changed into a prime (216345937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86716 + ... + 89175.

It is an arithmetic number, because the mean of its divisors is an integer number (16621794).

Almost surely, 2^216345930 is an apocalyptic number.

216345930 is an abundant number, since it is smaller than the sum of its proper divisors (315551478).

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

216345930 is a wasteful number, since it uses less digits than its factorization.

216345930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175942.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 216345930 is about 14708.7025260558. The cubic root of 216345930 is about 600.3201347148.

The spelling of 216345930 in words is "two hundred sixteen million, three hundred forty-five thousand, nine hundred thirty".