216554353 has 2 divisors, whose sum is σ = 216554354. Its totient is φ = 216554352.

The previous prime is 216554329. The next prime is 216554357. The reversal of 216554353 is 353455612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149035264 + 67519089 = 12208^2 + 8217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216554353 is a prime.

It is not a weakly prime, because it can be changed into another prime (216554357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108277176 + 108277177.

It is an arithmetic number, because the mean of its divisors is an integer number (108277177).

Almost surely, 2^216554353 is an apocalyptic number.

It is an amenable number.

216554353 is a deficient number, since it is larger than the sum of its proper divisors (1).

216554353 is an equidigital number, since it uses as much as digits as its factorization.

216554353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 34.

The square root of 216554353 is about 14715.7858437801. The cubic root of 216554353 is about 600.5128513291.

The spelling of 216554353 in words is "two hundred sixteen million, five hundred fifty-four thousand, three hundred fifty-three".