523321321423 has 4 divisors (see below), whose sum is σ = 524820809800. Its totient is φ = 521821833048.

The previous prime is 523321321421. The next prime is 523321321433. The reversal of 523321321423 is 324123123325.

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 523321321423 - 2¹ = 523321321421 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 (523321321421) 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, 749743665 + ... + 749744362.

It is an arithmetic number, because the mean of its divisors is an integer number (131205202450).

Almost surely, 2^523321321423 is an apocalyptic number.

523321321423 is a deficient number, since it is larger than the sum of its proper divisors (1499488377).

523321321423 is a wasteful number, since it uses less digits than its factorization.

523321321423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499488376.

The product of its digits is 25920, while the sum is 31.

Adding to 523321321423 its reverse (324123123325), we get a palindrome (847444444748).

The spelling of 523321321423 in words is "five hundred twenty-three billion, three hundred twenty-one million, three hundred twenty-one thousand, four hundred twenty-three".