217358423 has 4 divisors (see below), whose sum is σ = 228798360. Its totient is φ = 205918488.

The previous prime is 217358417. The next prime is 217358431. The reversal of 217358423 is 324853712.

217358423 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 cyclic number.

It is not a de Polignac number, because 217358423 - 2¹² = 217354327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217358443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5719940 + ... + 5719977.

It is an arithmetic number, because the mean of its divisors is an integer number (57199590).

Almost surely, 2^217358423 is an apocalyptic number.

217358423 is a deficient number, since it is larger than the sum of its proper divisors (11439937).

217358423 is a wasteful number, since it uses less digits than its factorization.

217358423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439936.

The product of its digits is 40320, while the sum is 35.

The square root of 217358423 is about 14743.0805125659. The cubic root of 217358423 is about 601.2551714840.

The spelling of 217358423 in words is "two hundred seventeen million, three hundred fifty-eight thousand, four hundred twenty-three".