531306340243 has 8 divisors (see below), whose sum is σ = 621328345088. Its totient is φ = 444814610184.

The previous prime is 531306340241. The next prime is 531306340349. The reversal of 531306340243 is 342043603135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531306340243 - 2¹ = 531306340241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531306340199 and 531306340208.

It is not an unprimeable number, because it can be changed into a prime (531306340241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882568371 + ... + 882568972.

It is an arithmetic number, because the mean of its divisors is an integer number (77666043136).

Almost surely, 2^531306340243 is an apocalyptic number.

531306340243 is a deficient number, since it is larger than the sum of its proper divisors (90022004845).

531306340243 is a wasteful number, since it uses less digits than its factorization.

531306340243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765137393.

The product of its (nonzero) digits is 77760, while the sum is 34.

Adding to 531306340243 its reverse (342043603135), we get a palindrome (873349943378).

The spelling of 531306340243 in words is "five hundred thirty-one billion, three hundred six million, three hundred forty thousand, two hundred forty-three".