531011143211 has 4 divisors (see below), whose sum is σ = 537408867912. Its totient is φ = 524613418512.

The previous prime is 531011143181. The next prime is 531011143331. The reversal of 531011143211 is 112341110135.

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 531011143211 - 2¹⁰ = 531011142187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531011143111) 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, 3198862226 + ... + 3198862391.

It is an arithmetic number, because the mean of its divisors is an integer number (134352216978).

Almost surely, 2^531011143211 is an apocalyptic number.

531011143211 is a deficient number, since it is larger than the sum of its proper divisors (6397724701).

531011143211 is an equidigital number, since it uses as much as digits as its factorization.

531011143211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397724700.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 531011143211 its reverse (112341110135), we get a palindrome (643352253346).

The spelling of 531011143211 in words is "five hundred thirty-one billion, eleven million, one hundred forty-three thousand, two hundred eleven".