531013609231 has 4 divisors (see below), whose sum is σ = 606872696272. Its totient is φ = 455154522192.

The previous prime is 531013609211. The next prime is 531013609261. The reversal of 531013609231 is 132906310135.

It is a happy number.

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 531013609231 - 2²⁵ = 530980054799 is a prime.

It is a super-2 number, since 2×531013609231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531013609201) 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, 37929543510 + ... + 37929543523.

It is an arithmetic number, because the mean of its divisors is an integer number (151718174068).

Almost surely, 2^531013609231 is an apocalyptic number.

531013609231 is a deficient number, since it is larger than the sum of its proper divisors (75859087041).

531013609231 is an equidigital number, since it uses as much as digits as its factorization.

531013609231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75859087040.

The product of its (nonzero) digits is 14580, while the sum is 34.

Adding to 531013609231 its reverse (132906310135), we get a palindrome (663919919366).

The spelling of 531013609231 in words is "five hundred thirty-one billion, thirteen million, six hundred nine thousand, two hundred thirty-one".