531040343 has 2 divisors, whose sum is σ = 531040344. Its totient is φ = 531040342.

The previous prime is 531040327. The next prime is 531040351. The reversal of 531040343 is 343040135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531040343 - 2⁴ = 531040327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531040313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265520171 + 265520172.

It is an arithmetic number, because the mean of its divisors is an integer number (265520172).

Almost surely, 2^531040343 is an apocalyptic number.

531040343 is a deficient number, since it is larger than the sum of its proper divisors (1).

531040343 is an equidigital number, since it uses as much as digits as its factorization.

531040343 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 531040343 is about 23044.3125955191. The cubic root of 531040343 is about 809.7963939805.

Adding to 531040343 its reverse (343040135), we get a palindrome (874080478).

The spelling of 531040343 in words is "five hundred thirty-one million, forty thousand, three hundred forty-three".