531505344449 has 2 divisors, whose sum is σ = 531505344450. Its totient is φ = 531505344448.

The previous prime is 531505344427. The next prime is 531505344479. The reversal of 531505344449 is 944443505135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343003492225 + 188501852224 = 585665^2 + 434168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531505344449 is a prime.

It is a super-2 number, since 2×531505344449² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (531505344479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265752672224 + 265752672225.

It is an arithmetic number, because the mean of its divisors is an integer number (265752672225).

Almost surely, 2^531505344449 is an apocalyptic number.

It is an amenable number.

531505344449 is a deficient number, since it is larger than the sum of its proper divisors (1).

531505344449 is an equidigital number, since it uses as much as digits as its factorization.

531505344449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 531505344449 in words is "five hundred thirty-one billion, five hundred five million, three hundred forty-four thousand, four hundred forty-nine".