215486599897 has 2 divisors, whose sum is σ = 215486599898. Its totient is φ = 215486599896.

The previous prime is 215486599891. The next prime is 215486599901. The reversal of 215486599897 is 798995684512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150655764736 + 64830835161 = 388144^2 + 254619^2 .

It is a cyclic number.

It is not a de Polignac number, because 215486599897 - 2²⁷ = 215352382169 is a prime.

It is not a weakly prime, because it can be changed into another prime (215486599891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107743299948 + 107743299949.

It is an arithmetic number, because the mean of its divisors is an integer number (107743299949).

Almost surely, 2^215486599897 is an apocalyptic number.

It is an amenable number.

215486599897 is a deficient number, since it is larger than the sum of its proper divisors (1).

215486599897 is an equidigital number, since it uses as much as digits as its factorization.

215486599897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 391910400, while the sum is 73.

The spelling of 215486599897 in words is "two hundred fifteen billion, four hundred eighty-six million, five hundred ninety-nine thousand, eight hundred ninety-seven".