216607241 has 2 divisors, whose sum is σ = 216607242. Its totient is φ = 216607240.

The previous prime is 216607229. The next prime is 216607243. The reversal of 216607241 is 142706612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144696841 + 71910400 = 12029^2 + 8480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216607241 is a prime.

Together with 216607243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216607243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108303620 + 108303621.

It is an arithmetic number, because the mean of its divisors is an integer number (108303621).

Almost surely, 2^216607241 is an apocalyptic number.

It is an amenable number.

216607241 is a deficient number, since it is larger than the sum of its proper divisors (1).

216607241 is an equidigital number, since it uses as much as digits as its factorization.

216607241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 216607241 is about 14717.5827159218. The cubic root of 216607241 is about 600.5617341124.

The spelling of 216607241 in words is "two hundred sixteen million, six hundred seven thousand, two hundred forty-one".