216480497 has 2 divisors, whose sum is σ = 216480498. Its totient is φ = 216480496.

The previous prime is 216480493. The next prime is 216480553. The reversal of 216480497 is 794084612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181953121 + 34527376 = 13489^2 + 5876^2 .

It is a cyclic number.

It is not a de Polignac number, because 216480497 - 2² = 216480493 is a prime.

It is not a weakly prime, because it can be changed into another prime (216480493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108240248 + 108240249.

It is an arithmetic number, because the mean of its divisors is an integer number (108240249).

Almost surely, 2^216480497 is an apocalyptic number.

It is an amenable number.

216480497 is a deficient number, since it is larger than the sum of its proper divisors (1).

216480497 is an equidigital number, since it uses as much as digits as its factorization.

216480497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 216480497 is about 14713.2762157176. The cubic root of 216480497 is about 600.4445751365. Note that the first 3 decimals are identical.

The spelling of 216480497 in words is "two hundred sixteen million, four hundred eighty thousand, four hundred ninety-seven".