215042106569 has 2 divisors, whose sum is σ = 215042106570. Its totient is φ = 215042106568.

The previous prime is 215042106563. The next prime is 215042106649. The reversal of 215042106569 is 965601240512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189987015625 + 25055090944 = 435875^2 + 158288^2 .

It is a cyclic number.

It is not a de Polignac number, because 215042106569 - 2¹⁶ = 215042041033 is a prime.

It is a super-2 number, since 2×215042106569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215042106563) 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, 107521053284 + 107521053285.

It is an arithmetic number, because the mean of its divisors is an integer number (107521053285).

Almost surely, 2^215042106569 is an apocalyptic number.

It is an amenable number.

215042106569 is a deficient number, since it is larger than the sum of its proper divisors (1).

215042106569 is an equidigital number, since it uses as much as digits as its factorization.

215042106569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 215042106569 in words is "two hundred fifteen billion, forty-two million, one hundred six thousand, five hundred sixty-nine".