103405215509 has 2 divisors, whose sum is σ = 103405215510. Its totient is φ = 103405215508.

The previous prime is 103405215491. The next prime is 103405215517. The reversal of 103405215509 is 905512504301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56693038609 + 46712176900 = 238103^2 + 216130^2 .

It is an emirp because it is prime and its reverse (905512504301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103405215509 - 2²⁸ = 103136780053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103405215569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51702607754 + 51702607755.

It is an arithmetic number, because the mean of its divisors is an integer number (51702607755).

Almost surely, 2^103405215509 is an apocalyptic number.

It is an amenable number.

103405215509 is a deficient number, since it is larger than the sum of its proper divisors (1).

103405215509 is an equidigital number, since it uses as much as digits as its factorization.

103405215509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 103405215509 in words is "one hundred three billion, four hundred five million, two hundred fifteen thousand, five hundred nine".