216415236487 has 2 divisors, whose sum is σ = 216415236488. Its totient is φ = 216415236486.

The previous prime is 216415236377. The next prime is 216415236509. The reversal of 216415236487 is 784632514612.

216415236487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216415236487 - 2²³ = 216406847879 is a prime.

It is a super-2 number, since 2×216415236487² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216415236487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216415230487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108207618243 + 108207618244.

It is an arithmetic number, because the mean of its divisors is an integer number (108207618244).

Almost surely, 2^216415236487 is an apocalyptic number.

216415236487 is a deficient number, since it is larger than the sum of its proper divisors (1).

216415236487 is an equidigital number, since it uses as much as digits as its factorization.

216415236487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 49.

The spelling of 216415236487 in words is "two hundred sixteen billion, four hundred fifteen million, two hundred thirty-six thousand, four hundred eighty-seven".