216384546 has 32 divisors (see below), whose sum is σ = 495525888. Its totient is φ = 61707600.

The previous prime is 216384533. The next prime is 216384583. The reversal of 216384546 is 645483612.

It is a super-2 number, since 2×216384546² = 93644543495252232, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19071 + ... + 28221.

It is an arithmetic number, because the mean of its divisors is an integer number (15485184).

Almost surely, 2^216384546 is an apocalyptic number.

216384546 is an abundant number, since it is smaller than the sum of its proper divisors (279141342).

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

216384546 is a wasteful number, since it uses less digits than its factorization.

216384546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9726.

The product of its digits is 138240, while the sum is 39.

The square root of 216384546 is about 14710.0151597475. The cubic root of 216384546 is about 600.3558500207.

The spelling of 216384546 in words is "two hundred sixteen million, three hundred eighty-four thousand, five hundred forty-six".