531130211 has 4 divisors (see below), whose sum is σ = 531199152. Its totient is φ = 531061272.

The previous prime is 531130181. The next prime is 531130219. The reversal of 531130211 is 112031135.

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-531130211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531130211.

It is not an unprimeable number, because it can be changed into a prime (531130219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21215 + ... + 38888.

It is an arithmetic number, because the mean of its divisors is an integer number (132799788).

Almost surely, 2^531130211 is an apocalyptic number.

531130211 is a deficient number, since it is larger than the sum of its proper divisors (68941).

531130211 is an equidigital number, since it uses as much as digits as its factorization.

531130211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68940.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 531130211 is about 23046.2624084688. The cubic root of 531130211 is about 809.8420720402.

Adding to 531130211 its reverse (112031135), we get a palindrome (643161346).

The spelling of 531130211 in words is "five hundred thirty-one million, one hundred thirty thousand, two hundred eleven".