216452191 has 8 divisors (see below), whose sum is σ = 220204944. Its totient is φ = 212731200.

The previous prime is 216452167. The next prime is 216452209. The reversal of 216452191 is 191254612.

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 216452191 - 2¹³ = 216443999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216452111) 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 7 ways as a sum of consecutive naturals, for example, 6016 + ... + 21658.

It is an arithmetic number, because the mean of its divisors is an integer number (27525618).

Almost surely, 2^216452191 is an apocalyptic number.

216452191 is a deficient number, since it is larger than the sum of its proper divisors (3752753).

216452191 is a wasteful number, since it uses less digits than its factorization.

216452191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15881.

The product of its digits is 4320, while the sum is 31.

The square root of 216452191 is about 14712.3142639083. The cubic root of 216452191 is about 600.4184035334.

It can be divided in two parts, 2164521 and 91, that added together give a palindrome (2164612).

The spelling of 216452191 in words is "two hundred sixteen million, four hundred fifty-two thousand, one hundred ninety-one".