216531370743599 has 2 divisors, whose sum is σ = 216531370743600. Its totient is φ = 216531370743598.

The previous prime is 216531370743469. The next prime is 216531370743643. The reversal of 216531370743599 is 995347073135612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216531370743599 - 2¹² = 216531370739503 is a prime.

It is a super-2 number, since 2×216531370743599² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216531370743799) 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, 108265685371799 + 108265685371800.

It is an arithmetic number, because the mean of its divisors is an integer number (108265685371800).

Almost surely, 2^{216531370743599} is an apocalyptic number.

216531370743599 is a deficient number, since it is larger than the sum of its proper divisors (1).

216531370743599 is an equidigital number, since it uses as much as digits as its factorization.

216531370743599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128595600, while the sum is 65.

The spelling of 216531370743599 in words is "two hundred sixteen trillion, five hundred thirty-one billion, three hundred seventy million, seven hundred forty-three thousand, five hundred ninety-nine".