216156041 has 2 divisors, whose sum is σ = 216156042. Its totient is φ = 216156040.

The previous prime is 216156011. The next prime is 216156043. The reversal of 216156041 is 140651612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132342016 + 83814025 = 11504^2 + 9155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216156041 is a prime.

Together with 216156043, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216156041.

It is not a weakly prime, because it can be changed into another prime (216156043) 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 as a sum of consecutive naturals, namely, 108078020 + 108078021.

It is an arithmetic number, because the mean of its divisors is an integer number (108078021).

Almost surely, 2^216156041 is an apocalyptic number.

It is an amenable number.

216156041 is a deficient number, since it is larger than the sum of its proper divisors (1).

216156041 is an equidigital number, since it uses as much as digits as its factorization.

216156041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 216156041 is about 14702.2461209164. The cubic root of 216156041 is about 600.1444476294.

The spelling of 216156041 in words is "two hundred sixteen million, one hundred fifty-six thousand, forty-one".