531354142409 has 2 divisors, whose sum is σ = 531354142410. Its totient is φ = 531354142408.

The previous prime is 531354142399. The next prime is 531354142427. The reversal of 531354142409 is 904241453135.

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., 507304336009 + 24049806400 = 712253^2 + 155080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531354142409 is a prime.

It is not a weakly prime, because it can be changed into another prime (531354142439) 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, 265677071204 + 265677071205.

It is an arithmetic number, because the mean of its divisors is an integer number (265677071205).

Almost surely, 2^531354142409 is an apocalyptic number.

It is an amenable number.

531354142409 is a deficient number, since it is larger than the sum of its proper divisors (1).

531354142409 is an equidigital number, since it uses as much as digits as its factorization.

531354142409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 531354142409 in words is "five hundred thirty-one billion, three hundred fifty-four million, one hundred forty-two thousand, four hundred nine".