215041117 has 2 divisors, whose sum is σ = 215041118. Its totient is φ = 215041116.

The previous prime is 215041111. The next prime is 215041129. The reversal of 215041117 is 711140512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214739716 + 301401 = 14654^2 + 549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215041117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215041111) 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, 107520558 + 107520559.

It is an arithmetic number, because the mean of its divisors is an integer number (107520559).

Almost surely, 2^215041117 is an apocalyptic number.

It is an amenable number.

215041117 is a deficient number, since it is larger than the sum of its proper divisors (1).

215041117 is an equidigital number, since it uses as much as digits as its factorization.

215041117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 215041117 is about 14664.2803096504. The cubic root of 215041117 is about 599.1108283108.

Adding to 215041117 its reverse (711140512), we get a palindrome (926181629).

The spelling of 215041117 in words is "two hundred fifteen million, forty-one thousand, one hundred seventeen".