216949942141 has 2 divisors, whose sum is σ = 216949942142. Its totient is φ = 216949942140.

The previous prime is 216949942093. The next prime is 216949942159. The reversal of 216949942141 is 141249949612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152923230916 + 64026711225 = 391054^2 + 253035^2 .

It is a cyclic number.

It is not a de Polignac number, because 216949942141 - 2²⁷ = 216815724413 is a prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108474971070 + 108474971071.

It is an arithmetic number, because the mean of its divisors is an integer number (108474971071).

Almost surely, 2^216949942141 is an apocalyptic number.

It is an amenable number.

216949942141 is a deficient number, since it is larger than the sum of its proper divisors (1).

216949942141 is an equidigital number, since it uses as much as digits as its factorization.

216949942141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The spelling of 216949942141 in words is "two hundred sixteen billion, nine hundred forty-nine million, nine hundred forty-two thousand, one hundred forty-one".