42103131302509 has 2 divisors, whose sum is σ = 42103131302510. Its totient is φ = 42103131302508.

The previous prime is 42103131302413. The next prime is 42103131302537. The reversal of 42103131302509 is 90520313130124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36897788666025 + 5205342636484 = 6074355^2 + 2281522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42103131302509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42103131302809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051565651254 + 21051565651255.

It is an arithmetic number, because the mean of its divisors is an integer number (21051565651255).

Almost surely, 2^{42103131302509} is an apocalyptic number.

It is an amenable number.

42103131302509 is a deficient number, since it is larger than the sum of its proper divisors (1).

42103131302509 is an equidigital number, since it uses as much as digits as its factorization.

42103131302509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 42103131302509 in words is "forty-two trillion, one hundred three billion, one hundred thirty-one million, three hundred two thousand, five hundred nine".