216204953 has 2 divisors, whose sum is σ = 216204954. Its totient is φ = 216204952.

The previous prime is 216204893. The next prime is 216204959. The reversal of 216204953 is 359402612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215150224 + 1054729 = 14668^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 216204953 - 2¹² = 216200857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216204959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108102476 + 108102477.

It is an arithmetic number, because the mean of its divisors is an integer number (108102477).

Almost surely, 2^216204953 is an apocalyptic number.

It is an amenable number.

216204953 is a deficient number, since it is larger than the sum of its proper divisors (1).

216204953 is an equidigital number, since it uses as much as digits as its factorization.

216204953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 216204953 is about 14703.9094461303. The cubic root of 216204953 is about 600.1897113060.

The spelling of 216204953 in words is "two hundred sixteen million, two hundred four thousand, nine hundred fifty-three".