523403505311 has 4 divisors (see below), whose sum is σ = 524131466400. Its totient is φ = 522675544224.

The previous prime is 523403505299. The next prime is 523403505353. The reversal of 523403505311 is 113505304325.

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 523403505311 - 2¹⁰ = 523403504287 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 (523403505371) 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, 363979466 + ... + 363980903.

It is an arithmetic number, because the mean of its divisors is an integer number (131032866600).

Almost surely, 2^523403505311 is an apocalyptic number.

523403505311 is a deficient number, since it is larger than the sum of its proper divisors (727961089).

523403505311 is an equidigital number, since it uses as much as digits as its factorization.

523403505311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727961088.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 523403505311 its reverse (113505304325), we get a palindrome (636908809636).

The spelling of 523403505311 in words is "five hundred twenty-three billion, four hundred three million, five hundred five thousand, three hundred eleven".