217322023 has 2 divisors, whose sum is σ = 217322024. Its totient is φ = 217322022.

The previous prime is 217321967. The next prime is 217322041. The reversal of 217322023 is 320223712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217322023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 217321985 and 217322003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217322093) 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, 108661011 + 108661012.

It is an arithmetic number, because the mean of its divisors is an integer number (108661012).

Almost surely, 2^217322023 is an apocalyptic number.

217322023 is a deficient number, since it is larger than the sum of its proper divisors (1).

217322023 is an equidigital number, since it uses as much as digits as its factorization.

217322023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 217322023 is about 14741.8459834581. The cubic root of 217322023 is about 601.2216064784.

Adding to 217322023 its reverse (320223712), we get a palindrome (537545735).

The spelling of 217322023 in words is "two hundred seventeen million, three hundred twenty-two thousand, twenty-three".