531230111 has 2 divisors, whose sum is σ = 531230112. Its totient is φ = 531230110.

The previous prime is 531230107. The next prime is 531230131. The reversal of 531230111 is 111032135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531230111 - 2² = 531230107 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531230111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531230131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265615055 + 265615056.

It is an arithmetic number, because the mean of its divisors is an integer number (265615056).

Almost surely, 2^531230111 is an apocalyptic number.

531230111 is a deficient number, since it is larger than the sum of its proper divisors (1).

531230111 is an equidigital number, since it uses as much as digits as its factorization.

531230111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 531230111 is about 23048.4296862064. The cubic root of 531230111 is about 809.8928431126.

Adding to 531230111 its reverse (111032135), we get a palindrome (642262246).

The spelling of 531230111 in words is "five hundred thirty-one million, two hundred thirty thousand, one hundred eleven".