216455453 has 2 divisors, whose sum is σ = 216455454. Its totient is φ = 216455452.

The previous prime is 216455431. The next prime is 216455489. The reversal of 216455453 is 354554612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201725209 + 14730244 = 14203^2 + 3838^2 .

It is a cyclic number.

It is not a de Polignac number, because 216455453 - 2¹⁰ = 216454429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216455413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108227726 + 108227727.

It is an arithmetic number, because the mean of its divisors is an integer number (108227727).

Almost surely, 2^216455453 is an apocalyptic number.

It is an amenable number.

216455453 is a deficient number, since it is larger than the sum of its proper divisors (1).

216455453 is an equidigital number, since it uses as much as digits as its factorization.

216455453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 35.

The square root of 216455453 is about 14712.4251230040. The cubic root of 216455453 is about 600.4214196805.

The spelling of 216455453 in words is "two hundred sixteen million, four hundred fifty-five thousand, four hundred fifty-three".