2217540975823 has 2 divisors, whose sum is σ = 2217540975824. Its totient is φ = 2217540975822.

The previous prime is 2217540975739. The next prime is 2217540975883. The reversal of 2217540975823 is 3285790457122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2217540975823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2217540975883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108770487911 + 1108770487912.

It is an arithmetic number, because the mean of its divisors is an integer number (1108770487912).

Almost surely, 2^{2217540975823} is an apocalyptic number.

2217540975823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217540975823 is an equidigital number, since it uses as much as digits as its factorization.

2217540975823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 2217540975823 in words is "two trillion, two hundred seventeen billion, five hundred forty million, nine hundred seventy-five thousand, eight hundred twenty-three".