216091203 has 4 divisors (see below), whose sum is σ = 288121608. Its totient is φ = 144060800.

The previous prime is 216091201. The next prime is 216091231. The reversal of 216091203 is 302190612.

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 216091203 - 2¹ = 216091201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216091201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36015198 + ... + 36015203.

It is an arithmetic number, because the mean of its divisors is an integer number (72030402).

Almost surely, 2^216091203 is an apocalyptic number.

216091203 is a deficient number, since it is larger than the sum of its proper divisors (72030405).

216091203 is an equidigital number, since it uses as much as digits as its factorization.

216091203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72030404.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 216091203 is about 14700.0409183104. The cubic root of 216091203 is about 600.0844353395.

The spelling of 216091203 in words is "two hundred sixteen million, ninety-one thousand, two hundred three".