531304245421133 has 4 divisors (see below), whose sum is σ = 531304299593340. Its totient is φ = 531304191248928.

The previous prime is 531304245421109. The next prime is 531304245421151. The reversal of 531304245421133 is 331124542403135.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 131258564116969 + 400045681304164 = 11456813^2 + 20001142^2 .

It is a cyclic number.

It is not a de Polignac number, because 531304245421133 - 2⁸ = 531304245420877 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 (531304245321133) 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, 7794560 + ... + 33516617.

It is an arithmetic number, because the mean of its divisors is an integer number (132826074898335).

Almost surely, 2^{531304245421133} is an apocalyptic number.

It is an amenable number.

531304245421133 is a deficient number, since it is larger than the sum of its proper divisors (54172207).

531304245421133 is a wasteful number, since it uses less digits than its factorization.

531304245421133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54172206.

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 531304245421133 its reverse (331124542403135), we get a palindrome (862428787824268).

The spelling of 531304245421133 in words is "five hundred thirty-one trillion, three hundred four billion, two hundred forty-five million, four hundred twenty-one thousand, one hundred thirty-three".