215944163 has 2 divisors, whose sum is σ = 215944164. Its totient is φ = 215944162.

The previous prime is 215944153. The next prime is 215944181. The reversal of 215944163 is 361449512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215944163 - 2¹⁰ = 215943139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215944123) 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, 107972081 + 107972082.

It is an arithmetic number, because the mean of its divisors is an integer number (107972082).

Almost surely, 2^215944163 is an apocalyptic number.

215944163 is a deficient number, since it is larger than the sum of its proper divisors (1).

215944163 is an equidigital number, since it uses as much as digits as its factorization.

215944163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 215944163 is about 14695.0387206023. The cubic root of 215944163 is about 599.9482946185.

The spelling of 215944163 in words is "two hundred fifteen million, nine hundred forty-four thousand, one hundred sixty-three".