216420683 has 2 divisors, whose sum is σ = 216420684. Its totient is φ = 216420682.

The previous prime is 216420671. The next prime is 216420689. The reversal of 216420683 is 386024612.

216420683 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 216420683 - 2⁴ = 216420667 is a prime.

It is not a weakly prime, because it can be changed into another prime (216420689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108210341 + 108210342.

It is an arithmetic number, because the mean of its divisors is an integer number (108210342).

Almost surely, 2^216420683 is an apocalyptic number.

216420683 is a deficient number, since it is larger than the sum of its proper divisors (1).

216420683 is an equidigital number, since it uses as much as digits as its factorization.

216420683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 216420683 is about 14711.2434212748. The cubic root of 216420683 is about 600.3892686915.

The spelling of 216420683 in words is "two hundred sixteen million, four hundred twenty thousand, six hundred eighty-three".