215186241097 has 2 divisors, whose sum is σ = 215186241098. Its totient is φ = 215186241096.

The previous prime is 215186241091. The next prime is 215186241107. The reversal of 215186241097 is 790142681512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214791463936 + 394777161 = 463456^2 + 19869^2 .

It is a cyclic number.

It is not a de Polignac number, because 215186241097 - 2³ = 215186241089 is a prime.

It is not a weakly prime, because it can be changed into another prime (215186241091) 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, 107593120548 + 107593120549.

It is an arithmetic number, because the mean of its divisors is an integer number (107593120549).

Almost surely, 2^215186241097 is an apocalyptic number.

It is an amenable number.

215186241097 is a deficient number, since it is larger than the sum of its proper divisors (1).

215186241097 is an equidigital number, since it uses as much as digits as its factorization.

215186241097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 215186241097 in words is "two hundred fifteen billion, one hundred eighty-six million, two hundred forty-one thousand, ninety-seven".