215873242099189 has 2 divisors, whose sum is σ = 215873242099190. Its totient is φ = 215873242099188.

The previous prime is 215873242099187. The next prime is 215873242099201. The reversal of 215873242099189 is 981990242378512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116880791344164 + 98992450755025 = 10811142^2 + 9949495^2 .

It is a cyclic number.

It is not a de Polignac number, because 215873242099189 - 2¹ = 215873242099187 is a prime.

It is a super-2 number, since 2×215873242099189² (a number of 29 digits) contains 22 as substring.

Together with 215873242099187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215873242099187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107936621049594 + 107936621049595.

It is an arithmetic number, because the mean of its divisors is an integer number (107936621049595).

Almost surely, 2^{215873242099189} is an apocalyptic number.

It is an amenable number.

215873242099189 is a deficient number, since it is larger than the sum of its proper divisors (1).

215873242099189 is an equidigital number, since it uses as much as digits as its factorization.

215873242099189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 215873242099189 in words is "two hundred fifteen trillion, eight hundred seventy-three billion, two hundred forty-two million, ninety-nine thousand, one hundred eighty-nine".