216986101 has 2 divisors, whose sum is σ = 216986102. Its totient is φ = 216986100.

The previous prime is 216986059. The next prime is 216986141. The reversal of 216986101 is 101689612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129937201 + 87048900 = 11399^2 + 9330^2 .

It is a cyclic number.

It is not a de Polignac number, because 216986101 - 2⁹ = 216985589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216986141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108493050 + 108493051.

It is an arithmetic number, because the mean of its divisors is an integer number (108493051).

Almost surely, 2^216986101 is an apocalyptic number.

It is an amenable number.

216986101 is a deficient number, since it is larger than the sum of its proper divisors (1).

216986101 is an equidigital number, since it uses as much as digits as its factorization.

216986101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 216986101 is about 14730.4480923019. The cubic root of 216986101 is about 600.9116705413.

The spelling of 216986101 in words is "two hundred sixteen million, nine hundred eighty-six thousand, one hundred one".