531230243 has 2 divisors, whose sum is σ = 531230244. Its totient is φ = 531230242.

The previous prime is 531230239. The next prime is 531230251. The reversal of 531230243 is 342032135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531230243 - 2² = 531230239 is a prime.

It is not a weakly prime, because it can be changed into another prime (531232243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265615121 + 265615122.

It is an arithmetic number, because the mean of its divisors is an integer number (265615122).

Almost surely, 2^531230243 is an apocalyptic number.

531230243 is a deficient number, since it is larger than the sum of its proper divisors (1).

531230243 is an equidigital number, since it uses as much as digits as its factorization.

531230243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 531230243 is about 23048.4325497419. The cubic root of 531230243 is about 809.8929101933.

Adding to 531230243 its reverse (342032135), we get a palindrome (873262378).

The spelling of 531230243 in words is "five hundred thirty-one million, two hundred thirty thousand, two hundred forty-three".