216542183103551 has 2 divisors, whose sum is σ = 216542183103552. Its totient is φ = 216542183103550.

The previous prime is 216542183103529. The next prime is 216542183103559. The reversal of 216542183103551 is 155301381245612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216542183103551 - 2⁶ = 216542183103487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216542183103496 and 216542183103505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216542183103559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108271091551775 + 108271091551776.

It is an arithmetic number, because the mean of its divisors is an integer number (108271091551776).

Almost surely, 2^{216542183103551} is an apocalyptic number.

216542183103551 is a deficient number, since it is larger than the sum of its proper divisors (1).

216542183103551 is an equidigital number, since it uses as much as digits as its factorization.

216542183103551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 216542183103551 in words is "two hundred sixteen trillion, five hundred forty-two billion, one hundred eighty-three million, one hundred three thousand, five hundred fifty-one".