217881423803 has 2 divisors, whose sum is σ = 217881423804. Its totient is φ = 217881423802.

The previous prime is 217881423743. The next prime is 217881423841. The reversal of 217881423803 is 308324188712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217881423803 - 2¹⁶ = 217881358267 is a prime.

It is not a weakly prime, because it can be changed into another prime (217881923803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108940711901 + 108940711902.

It is an arithmetic number, because the mean of its divisors is an integer number (108940711902).

Almost surely, 2^217881423803 is an apocalyptic number.

217881423803 is a deficient number, since it is larger than the sum of its proper divisors (1).

217881423803 is an equidigital number, since it uses as much as digits as its factorization.

217881423803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 217881423803 in words is "two hundred seventeen billion, eight hundred eighty-one million, four hundred twenty-three thousand, eight hundred three".