216134201 has 4 divisors (see below), whose sum is σ = 223106304. Its totient is φ = 209162100.

The previous prime is 216134183. The next prime is 216134203. The reversal of 216134201 is 102431612.

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 a cyclic number.

It is not a de Polignac number, because 216134201 - 2⁶ = 216134137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216134203) 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, 3486005 + ... + 3486066.

It is an arithmetic number, because the mean of its divisors is an integer number (55776576).

Almost surely, 2^216134201 is an apocalyptic number.

It is an amenable number.

216134201 is a deficient number, since it is larger than the sum of its proper divisors (6972103).

216134201 is an equidigital number, since it uses as much as digits as its factorization.

216134201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6972102.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 216134201 is about 14701.5033585004. The cubic root of 216134201 is about 600.1242344597.

Adding to 216134201 its reverse (102431612), we get a palindrome (318565813).

The spelling of 216134201 in words is "two hundred sixteen million, one hundred thirty-four thousand, two hundred one".