217323263463 has 4 divisors (see below), whose sum is σ = 289764351288. Its totient is φ = 144882175640.

The previous prime is 217323263461. The next prime is 217323263467. The reversal of 217323263463 is 364362323712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217323263463 - 2¹ = 217323263461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217323263461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36220543908 + ... + 36220543913.

It is an arithmetic number, because the mean of its divisors is an integer number (72441087822).

Almost surely, 2^217323263463 is an apocalyptic number.

217323263463 is a deficient number, since it is larger than the sum of its proper divisors (72441087825).

217323263463 is an equidigital number, since it uses as much as digits as its factorization.

217323263463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72441087824.

The product of its digits is 653184, while the sum is 42.

The spelling of 217323263463 in words is "two hundred seventeen billion, three hundred twenty-three million, two hundred sixty-three thousand, four hundred sixty-three".