103515108409 has 4 divisors (see below), whose sum is σ = 105468223716. Its totient is φ = 101561993104.

The previous prime is 103515108407. The next prime is 103515108427. The reversal of 103515108409 is 904801515301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904801515301 = 18593 ⋅48663557.

It can be written as a sum of positive squares in 2 ways, for example, as 36721290384 + 66793818025 = 191628^2 + 258445^2 .

It is a cyclic number.

It is not a de Polignac number, because 103515108409 - 2¹ = 103515108407 is a prime.

It is a super-2 number, since 2×103515108409² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103515108407) 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 in 3 ways as a sum of consecutive naturals, for example, 976557574 + ... + 976557679.

It is an arithmetic number, because the mean of its divisors is an integer number (26367055929).

Almost surely, 2^103515108409 is an apocalyptic number.

It is an amenable number.

103515108409 is a deficient number, since it is larger than the sum of its proper divisors (1953115307).

103515108409 is an equidigital number, since it uses as much as digits as its factorization.

103515108409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953115306.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 103515108409 in words is "one hundred three billion, five hundred fifteen million, one hundred eight thousand, four hundred nine".