216523400003 has 2 divisors, whose sum is σ = 216523400004. Its totient is φ = 216523400002.

The previous prime is 216523399943. The next prime is 216523400021. The reversal of 216523400003 is 300004325612.

216523400003 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 216523400003 - 2⁸ = 216523399747 is a prime.

It is not a weakly prime, because it can be changed into another prime (216523400053) 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, 108261700001 + 108261700002.

It is an arithmetic number, because the mean of its divisors is an integer number (108261700002).

Almost surely, 2^216523400003 is an apocalyptic number.

216523400003 is a deficient number, since it is larger than the sum of its proper divisors (1).

216523400003 is an equidigital number, since it uses as much as digits as its factorization.

216523400003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 216523400003 its reverse (300004325612), we get a palindrome (516527725615).

The spelling of 216523400003 in words is "two hundred sixteen billion, five hundred twenty-three million, four hundred thousand, three".