216903113 has 4 divisors (see below), whose sum is σ = 247889280. Its totient is φ = 185916948.

The previous prime is 216903109. The next prime is 216903131. The reversal of 216903113 is 311309612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 216903113 - 2² = 216903109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216903103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15493073 + ... + 15493086.

It is an arithmetic number, because the mean of its divisors is an integer number (61972320).

Almost surely, 2^216903113 is an apocalyptic number.

It is an amenable number.

216903113 is a deficient number, since it is larger than the sum of its proper divisors (30986167).

216903113 is an equidigital number, since it uses as much as digits as its factorization.

216903113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30986166.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 216903113 is about 14727.6309364405. The cubic root of 216903113 is about 600.8350530124.

The spelling of 216903113 in words is "two hundred sixteen million, nine hundred three thousand, one hundred thirteen".