523401345503 has 6 divisors (see below), whose sum is σ = 552398650344. Its totient is φ = 495853905924.

The previous prime is 523401345487. The next prime is 523401345517. The reversal of 523401345503 is 305543104325.

It is a happy number.

It is not a de Polignac number, because 523401345503 - 2⁴ = 523401345487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523401345583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 724932251 + ... + 724932972.

It is an arithmetic number, because the mean of its divisors is an integer number (92066441724).

Almost surely, 2^523401345503 is an apocalyptic number.

523401345503 is a deficient number, since it is larger than the sum of its proper divisors (28997304841).

523401345503 is a wasteful number, since it uses less digits than its factorization.

523401345503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449865261 (or 1449865242 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 523401345503 its reverse (305543104325), we get a palindrome (828944449828).

The spelling of 523401345503 in words is "five hundred twenty-three billion, four hundred one million, three hundred forty-five thousand, five hundred three".