11103520513 has 4 divisors (see below), whose sum is σ = 11403615700. Its totient is φ = 10803425328.

The previous prime is 11103520487. The next prime is 11103520537. The reversal of 11103520513 is 31502530111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31502530111 = 13 ⋅2423271547.

It can be written as a sum of positive squares in 2 ways, for example, as 9488123649 + 1615396864 = 97407^2 + 40192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11103520513 is a prime.

It is a super-2 number, since 2×11103520513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11103520543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150047538 + ... + 150047611.

It is an arithmetic number, because the mean of its divisors is an integer number (2850903925).

Almost surely, 2^11103520513 is an apocalyptic number.

It is an amenable number.

11103520513 is a deficient number, since it is larger than the sum of its proper divisors (300095187).

11103520513 is an equidigital number, since it uses as much as digits as its factorization.

11103520513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300095186.

The product of its (nonzero) digits is 450, while the sum is 22.

The spelling of 11103520513 in words is "eleven billion, one hundred three million, five hundred twenty thousand, five hundred thirteen".