216233515 has 4 divisors (see below), whose sum is σ = 259480224. Its totient is φ = 172986808.

The previous prime is 216233503. The next prime is 216233531. The reversal of 216233515 is 515332612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216233515 - 2¹⁹ = 215709227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21623347 + ... + 21623356.

It is an arithmetic number, because the mean of its divisors is an integer number (64870056).

Almost surely, 2^216233515 is an apocalyptic number.

216233515 is a deficient number, since it is larger than the sum of its proper divisors (43246709).

216233515 is an equidigital number, since it uses as much as digits as its factorization.

216233515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43246708.

The product of its digits is 5400, while the sum is 28.

The square root of 216233515 is about 14704.8806523549. The cubic root of 216233515 is about 600.2161397226.

The spelling of 216233515 in words is "two hundred sixteen million, two hundred thirty-three thousand, five hundred fifteen".