217324215254 has 4 divisors (see below), whose sum is σ = 325986322884. Its totient is φ = 108662107626.

The previous prime is 217324215247. The next prime is 217324215271. The reversal of 217324215254 is 452512423712.

217324215254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54331053812 + ... + 54331053815.

It is an arithmetic number, because the mean of its divisors is an integer number (81496580721).

Almost surely, 2^217324215254 is an apocalyptic number.

217324215254 is a deficient number, since it is larger than the sum of its proper divisors (108662107630).

217324215254 is a wasteful number, since it uses less digits than its factorization.

217324215254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108662107629.

The product of its digits is 134400, while the sum is 38.

Adding to 217324215254 its reverse (452512423712), we get a palindrome (669836638966).

The spelling of 217324215254 in words is "two hundred seventeen billion, three hundred twenty-four million, two hundred fifteen thousand, two hundred fifty-four".