217006741 has 6 divisors (see below), whose sum is σ = 252436470. Its totient is φ = 186005736.

The previous prime is 217006703. The next prime is 217006799. The reversal of 217006741 is 147600712.

It can be written as a sum of positive squares in only one way, i.e., 132917841 + 84088900 = 11529^2 + 9170^2 .

It is not a de Polignac number, because 217006741 - 2⁷ = 217006613 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 (217003741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2214306 + ... + 2214403.

It is an arithmetic number, because the mean of its divisors is an integer number (42072745).

Almost surely, 2^217006741 is an apocalyptic number.

It is an amenable number.

217006741 is a deficient number, since it is larger than the sum of its proper divisors (35429729).

217006741 is an equidigital number, since it uses as much as digits as its factorization.

217006741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428723 (or 4428716 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 217006741 is about 14731.1486653282. The cubic root of 217006741 is about 600.9307231036.

It can be divided in two parts, 21700 and 6741, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 217006741 in words is "two hundred seventeen million, six thousand, seven hundred forty-one".