216673253 has 2 divisors, whose sum is σ = 216673254. Its totient is φ = 216673252.

The previous prime is 216673213. The next prime is 216673273. The reversal of 216673253 is 352376612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169572484 + 47100769 = 13022^2 + 6863^2 .

It is a cyclic number.

It is not a de Polignac number, because 216673253 - 2⁸ = 216672997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216673213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108336626 + 108336627.

It is an arithmetic number, because the mean of its divisors is an integer number (108336627).

Almost surely, 2^216673253 is an apocalyptic number.

It is an amenable number.

216673253 is a deficient number, since it is larger than the sum of its proper divisors (1).

216673253 is an equidigital number, since it uses as much as digits as its factorization.

216673253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 216673253 is about 14719.8251687987. The cubic root of 216673253 is about 600.6227358506.

The spelling of 216673253 in words is "two hundred sixteen million, six hundred seventy-three thousand, two hundred fifty-three".