216005113 has 2 divisors, whose sum is σ = 216005114. Its totient is φ = 216005112.

The previous prime is 216005059. The next prime is 216005173. The reversal of 216005113 is 311500612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190522809 + 25482304 = 13803^2 + 5048^2 .

It is a cyclic number.

It is not a de Polignac number, because 216005113 - 2²¹ = 213907961 is a prime.

It is not a weakly prime, because it can be changed into another prime (216005173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108002556 + 108002557.

It is an arithmetic number, because the mean of its divisors is an integer number (108002557).

Almost surely, 2^216005113 is an apocalyptic number.

It is an amenable number.

216005113 is a deficient number, since it is larger than the sum of its proper divisors (1).

216005113 is an equidigital number, since it uses as much as digits as its factorization.

216005113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 216005113 is about 14697.1124034621. The cubic root of 216005113 is about 600.0047342219.

Adding to 216005113 its reverse (311500612), we get a palindrome (527505725).

The spelling of 216005113 in words is "two hundred sixteen million, five thousand, one hundred thirteen".