216528403615019 has 2 divisors, whose sum is σ = 216528403615020. Its totient is φ = 216528403615018.

The previous prime is 216528403614983. The next prime is 216528403615037. The reversal of 216528403615019 is 910516304825612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216528403615019 is a prime.

It is a super-2 number, since 2×216528403615019² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (216528403615099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108264201807509 + 108264201807510.

It is an arithmetic number, because the mean of its divisors is an integer number (108264201807510).

Almost surely, 2^{216528403615019} is an apocalyptic number.

216528403615019 is a deficient number, since it is larger than the sum of its proper divisors (1).

216528403615019 is an equidigital number, since it uses as much as digits as its factorization.

216528403615019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 216528403615019 in words is "two hundred sixteen trillion, five hundred twenty-eight billion, four hundred three million, six hundred fifteen thousand, nineteen".