531155033131 has 4 divisors (see below), whose sum is σ = 531175699872. Its totient is φ = 531134366392.

The previous prime is 531155033119. The next prime is 531155033153. The reversal of 531155033131 is 131330551135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531155033131 is a prime.

It is a super-2 number, since 2×531155033131² (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 = 531155033093 and 531155033102.

It is not an unprimeable number, because it can be changed into a prime (531155036131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10294771 + ... + 10346236.

It is an arithmetic number, because the mean of its divisors is an integer number (132793924968).

Almost surely, 2^531155033131 is an apocalyptic number.

531155033131 is a deficient number, since it is larger than the sum of its proper divisors (20666741).

531155033131 is a wasteful number, since it uses less digits than its factorization.

531155033131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20666740.

The product of its (nonzero) digits is 10125, while the sum is 31.

Adding to 531155033131 its reverse (131330551135), we get a palindrome (662485584266).

The spelling of 531155033131 in words is "five hundred thirty-one billion, one hundred fifty-five million, thirty-three thousand, one hundred thirty-one".