217825992953 has 2 divisors, whose sum is σ = 217825992954. Its totient is φ = 217825992952.

The previous prime is 217825992907. The next prime is 217825992959. The reversal of 217825992953 is 359299528712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216567375424 + 1258617529 = 465368^2 + 35477^2 .

It is a cyclic number.

It is not a de Polignac number, because 217825992953 - 2¹² = 217825988857 is a prime.

It is not a weakly prime, because it can be changed into another prime (217825992959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108912996476 + 108912996477.

It is an arithmetic number, because the mean of its divisors is an integer number (108912996477).

Almost surely, 2^217825992953 is an apocalyptic number.

It is an amenable number.

217825992953 is a deficient number, since it is larger than the sum of its proper divisors (1).

217825992953 is an equidigital number, since it uses as much as digits as its factorization.

217825992953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 62.

The spelling of 217825992953 in words is "two hundred seventeen billion, eight hundred twenty-five million, nine hundred ninety-two thousand, nine hundred fifty-three".