216657113 has 2 divisors, whose sum is σ = 216657114. Its totient is φ = 216657112.

The previous prime is 216657107. The next prime is 216657127. The reversal of 216657113 is 311756612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212343184 + 4313929 = 14572^2 + 2077^2 .

It is a cyclic number.

It is not a de Polignac number, because 216657113 - 2¹⁴ = 216640729 is a prime.

It is a super-2 number, since 2×216657113² = 93880609226989538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216657113.

It is not a weakly prime, because it can be changed into another prime (216657193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108328556 + 108328557.

It is an arithmetic number, because the mean of its divisors is an integer number (108328557).

Almost surely, 2^216657113 is an apocalyptic number.

It is an amenable number.

216657113 is a deficient number, since it is larger than the sum of its proper divisors (1).

216657113 is an equidigital number, since it uses as much as digits as its factorization.

216657113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 216657113 is about 14719.2769183816. The cubic root of 216657113 is about 600.6078220090.

The spelling of 216657113 in words is "two hundred sixteen million, six hundred fifty-seven thousand, one hundred thirteen".