216346541 has 2 divisors, whose sum is σ = 216346542. Its totient is φ = 216346540.

The previous prime is 216346517. The next prime is 216346549. The reversal of 216346541 is 145643612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194490916 + 21855625 = 13946^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 216346541 - 2¹⁰ = 216345517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216346498 and 216346507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216346549) 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 as a sum of consecutive naturals, namely, 108173270 + 108173271.

It is an arithmetic number, because the mean of its divisors is an integer number (108173271).

Almost surely, 2^216346541 is an apocalyptic number.

It is an amenable number.

216346541 is a deficient number, since it is larger than the sum of its proper divisors (1).

216346541 is an equidigital number, since it uses as much as digits as its factorization.

216346541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 216346541 is about 14708.7232960580. The cubic root of 216346541 is about 600.3206998518.

The spelling of 216346541 in words is "two hundred sixteen million, three hundred forty-six thousand, five hundred forty-one".