216613143 has 8 divisors (see below), whose sum is σ = 320908400. Its totient is φ = 144408744.

The previous prime is 216613139. The next prime is 216613157. The reversal of 216613143 is 341316612.

216613143 is a `hidden beast` number, since 2 + 1 + 6 + 613 + 1 + 43 = 666.

It is not a de Polignac number, because 216613143 - 2² = 216613139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8022709 = 216613143 / (2 + 1 + 6 + 6 + 1 + 3 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216613543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4011328 + ... + 4011381.

It is an arithmetic number, because the mean of its divisors is an integer number (40113550).

Almost surely, 2^216613143 is an apocalyptic number.

216613143 is a deficient number, since it is larger than the sum of its proper divisors (104295257).

216613143 is an equidigital number, since it uses as much as digits as its factorization.

216613143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022718 (or 8022712 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 216613143 is about 14717.7832230265. The cubic root of 216613143 is about 600.5671886594.

Adding to 216613143 its reverse (341316612), we get a palindrome (557929755).

The spelling of 216613143 in words is "two hundred sixteen million, six hundred thirteen thousand, one hundred forty-three".