531243520231 has 8 divisors (see below), whose sum is σ = 535082889600. Its totient is φ = 527404400760.

The previous prime is 531243520201. The next prime is 531243520261. The reversal of 531243520231 is 132025342135.

It is an interprime number because it is at equal distance from previous prime (531243520201) and next prime (531243520261).

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

It is a cyclic number.

It is not a de Polignac number, because 531243520231 - 2²¹ = 531241423079 is a prime.

It is a super-2 number, since 2×531243520231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531243520193 and 531243520202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531243520201) 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, 7455390 + ... + 7526308.

It is an arithmetic number, because the mean of its divisors is an integer number (66885361200).

Almost surely, 2^531243520231 is an apocalyptic number.

531243520231 is a deficient number, since it is larger than the sum of its proper divisors (3839369369).

531243520231 is a wasteful number, since it uses less digits than its factorization.

531243520231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124949.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 531243520231 its reverse (132025342135), we get a palindrome (663268862366).

The spelling of 531243520231 in words is "five hundred thirty-one billion, two hundred forty-three million, five hundred twenty thousand, two hundred thirty-one".