216203313 has 8 divisors (see below), whose sum is σ = 288425088. Its totient is φ = 144058544.

The previous prime is 216203303. The next prime is 216203347. The reversal of 216203313 is 313302612.

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

It is a cyclic number.

It is not a de Polignac number, because 216203313 - 2⁶ = 216203249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216203313.

It is not an unprimeable number, because it can be changed into a prime (216203303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12345 + ... + 24182.

It is an arithmetic number, because the mean of its divisors is an integer number (36053136).

Almost surely, 2^216203313 is an apocalyptic number.

It is an amenable number.

216203313 is a deficient number, since it is larger than the sum of its proper divisors (72221775).

216203313 is a wasteful number, since it uses less digits than its factorization.

216203313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38503.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 216203313 is about 14703.8536785429. The cubic root of 216203313 is about 600.1881937435.

Adding to 216203313 its reverse (313302612), we get a palindrome (529505925).

The spelling of 216203313 in words is "two hundred sixteen million, two hundred three thousand, three hundred thirteen".