216344741 has 4 divisors (see below), whose sum is σ = 221621484. Its totient is φ = 211068000.

The previous prime is 216344719. The next prime is 216344759. The reversal of 216344741 is 147443612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101404900 + 114939841 = 10070^2 + 10721^2 .

It is not a de Polignac number, because 216344741 - 2⁶ = 216344677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216344698 and 216344707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216344761) 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 3 ways as a sum of consecutive naturals, for example, 2638310 + ... + 2638391.

It is an arithmetic number, because the mean of its divisors is an integer number (55405371).

Almost surely, 2^216344741 is an apocalyptic number.

It is an amenable number.

216344741 is a deficient number, since it is larger than the sum of its proper divisors (5276743).

216344741 is an equidigital number, since it uses as much as digits as its factorization.

216344741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276742.

The product of its digits is 16128, while the sum is 32.

The square root of 216344741 is about 14708.6621077513. The cubic root of 216344741 is about 600.3190349607.

The spelling of 216344741 in words is "two hundred sixteen million, three hundred forty-four thousand, seven hundred forty-one".