531126203 has 2 divisors, whose sum is σ = 531126204. Its totient is φ = 531126202.

The previous prime is 531126199. The next prime is 531126227. The reversal of 531126203 is 302621135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531126203 - 2² = 531126199 is a prime.

It is not a weakly prime, because it can be changed into another prime (531126403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265563101 + 265563102.

It is an arithmetic number, because the mean of its divisors is an integer number (265563102).

Almost surely, 2^531126203 is an apocalyptic number.

531126203 is a deficient number, since it is larger than the sum of its proper divisors (1).

531126203 is an equidigital number, since it uses as much as digits as its factorization.

531126203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 531126203 is about 23046.1754527731. The cubic root of 531126203 is about 809.8400349658.

Adding to 531126203 its reverse (302621135), we get a palindrome (833747338).

The spelling of 531126203 in words is "five hundred thirty-one million, one hundred twenty-six thousand, two hundred three".