36531315217 has 2 divisors, whose sum is σ = 36531315218. Its totient is φ = 36531315216.

The previous prime is 36531315193. The next prime is 36531315221. The reversal of 36531315217 is 71251313563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28061610256 + 8469704961 = 167516^2 + 92031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36531315217 is a prime.

It is not a weakly prime, because it can be changed into another prime (36531315277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18265657608 + 18265657609.

It is an arithmetic number, because the mean of its divisors is an integer number (18265657609).

Almost surely, 2^36531315217 is an apocalyptic number.

It is an amenable number.

36531315217 is a deficient number, since it is larger than the sum of its proper divisors (1).

36531315217 is an equidigital number, since it uses as much as digits as its factorization.

36531315217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 37.

The spelling of 36531315217 in words is "thirty-six billion, five hundred thirty-one million, three hundred fifteen thousand, two hundred seventeen".