216203315 has 4 divisors (see below), whose sum is σ = 259443984. Its totient is φ = 172962648.

The previous prime is 216203303. The next prime is 216203347. The reversal of 216203315 is 513302612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216203315 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21620327 + ... + 21620336.

It is an arithmetic number, because the mean of its divisors is an integer number (64860996).

Almost surely, 2^216203315 is an apocalyptic number.

216203315 is a deficient number, since it is larger than the sum of its proper divisors (43240669).

216203315 is an equidigital number, since it uses as much as digits as its factorization.

216203315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43240668.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 216203315 is about 14703.8537465523. The cubic root of 216203315 is about 600.1881955942.

Adding to 216203315 its reverse (513302612), we get a palindrome (729505927).

The spelling of 216203315 in words is "two hundred sixteen million, two hundred three thousand, three hundred fifteen".