216511236406033 has 2 divisors, whose sum is σ = 216511236406034. Its totient is φ = 216511236406032.

The previous prime is 216511236406009. The next prime is 216511236406079. The reversal of 216511236406033 is 330604632115612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111923450454544 + 104587785951489 = 10579388^2 + 10226817^2 .

It is a cyclic number.

It is not a de Polignac number, because 216511236406033 - 2¹⁷ = 216511236274961 is a prime.

It is not a weakly prime, because it can be changed into another prime (216511236407033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108255618203016 + 108255618203017.

It is an arithmetic number, because the mean of its divisors is an integer number (108255618203017).

Almost surely, 2^{216511236406033} is an apocalyptic number.

It is an amenable number.

216511236406033 is a deficient number, since it is larger than the sum of its proper divisors (1).

216511236406033 is an equidigital number, since it uses as much as digits as its factorization.

216511236406033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 216511236406033 in words is "two hundred sixteen trillion, five hundred eleven billion, two hundred thirty-six million, four hundred six thousand, thirty-three".