216451133 has 2 divisors, whose sum is σ = 216451134. Its totient is φ = 216451132.

The previous prime is 216451063. The next prime is 216451139. The reversal of 216451133 is 331154612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193822084 + 22629049 = 13922^2 + 4757^2 .

It is a cyclic number.

It is not a de Polignac number, because 216451133 - 2⁸ = 216450877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216451139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108225566 + 108225567.

It is an arithmetic number, because the mean of its divisors is an integer number (108225567).

Almost surely, 2^216451133 is an apocalyptic number.

It is an amenable number.

216451133 is a deficient number, since it is larger than the sum of its proper divisors (1).

216451133 is an equidigital number, since it uses as much as digits as its factorization.

216451133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 216451133 is about 14712.2783075906. The cubic root of 216451133 is about 600.4174252670.

The spelling of 216451133 in words is "two hundred sixteen million, four hundred fifty-one thousand, one hundred thirty-three".