216565046 has 8 divisors (see below), whose sum is σ = 330353640. Its totient is φ = 106447168.

The previous prime is 216565031. The next prime is 216565051. The reversal of 216565046 is 640565612.

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

It is a junction number, because it is equal to n+sod(n) for n = 216564997 and 216565015.

It is a congruent number.

It is an unprimeable number.

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, 917531 + ... + 917766.

It is an arithmetic number, because the mean of its divisors is an integer number (41294205).

Almost surely, 2^216565046 is an apocalyptic number.

216565046 is a deficient number, since it is larger than the sum of its proper divisors (113788594).

216565046 is a wasteful number, since it uses less digits than its factorization.

216565046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835358.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 216565046 is about 14716.1491566238. The cubic root of 216565046 is about 600.5227351884.

The spelling of 216565046 in words is "two hundred sixteen million, five hundred sixty-five thousand, forty-six".