216304546 has 8 divisors (see below), whose sum is σ = 334923264. Its totient is φ = 104663460.

The previous prime is 216304537. The next prime is 216304547. The reversal of 216304546 is 645403612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×216304546² = 93575313240532232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (216304547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1744330 + ... + 1744453.

It is an arithmetic number, because the mean of its divisors is an integer number (41865408).

Almost surely, 2^216304546 is an apocalyptic number.

216304546 is a deficient number, since it is larger than the sum of its proper divisors (118618718).

216304546 is a wasteful number, since it uses less digits than its factorization.

216304546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488816.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 216304546 is about 14707.2956725565. The cubic root of 216304546 is about 600.2818546129.

The spelling of 216304546 in words is "two hundred sixteen million, three hundred four thousand, five hundred forty-six".