216434363 has 4 divisors (see below), whose sum is σ = 216513960. Its totient is φ = 216354768.

The previous prime is 216434353. The next prime is 216434371. The reversal of 216434363 is 363434612.

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 216434363 - 2¹⁰ = 216433339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216434333) 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, 35570 + ... + 41207.

It is an arithmetic number, because the mean of its divisors is an integer number (54128490).

Almost surely, 2^216434363 is an apocalyptic number.

216434363 is a deficient number, since it is larger than the sum of its proper divisors (79597).

216434363 is an equidigital number, since it uses as much as digits as its factorization.

216434363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79596.

The product of its digits is 31104, while the sum is 32.

The square root of 216434363 is about 14711.7083644287. The cubic root of 216434363 is about 600.4019186718.

Adding to 216434363 its reverse (363434612), we get a palindrome (579868975).

The spelling of 216434363 in words is "two hundred sixteen million, four hundred thirty-four thousand, three hundred sixty-three".