216506335 has 8 divisors (see below), whose sum is σ = 263467296. Its totient is φ = 170765280.

The previous prime is 216506321. The next prime is 216506347. The reversal of 216506335 is 533605612.

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

It is not a de Polignac number, because 216506335 - 2¹¹ = 216504287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216506297 and 216506306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304584 + ... + 305293.

It is an arithmetic number, because the mean of its divisors is an integer number (32933412).

Almost surely, 2^216506335 is an apocalyptic number.

216506335 is a deficient number, since it is larger than the sum of its proper divisors (46960961).

216506335 is an equidigital number, since it uses as much as digits as its factorization.

216506335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609953.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 216506335 is about 14714.1542400506. The cubic root of 216506335 is about 600.4684628461.

The spelling of 216506335 in words is "two hundred sixteen million, five hundred six thousand, three hundred thirty-five".