11500513 has 4 divisors (see below), whose sum is σ = 11689108. Its totient is φ = 11311920.

The previous prime is 11500507. The next prime is 11500519. The reversal of 11500513 is 31500511.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11500507) and next prime (11500519).

It can be written as a sum of positive squares in 2 ways, for example, as 4194304 + 7306209 = 2048^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 11500513 - 2⁹ = 11500001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11500519) 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, 94206 + ... + 94327.

It is an arithmetic number, because the mean of its divisors is an integer number (2922277).

Almost surely, 2^11500513 is an apocalyptic number.

It is an amenable number.

11500513 is a deficient number, since it is larger than the sum of its proper divisors (188595).

11500513 is an equidigital number, since it uses as much as digits as its factorization.

11500513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188594.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 11500513 is about 3391.2406284426. The cubic root of 11500513 is about 225.7212280504.

The spelling of 11500513 in words is "eleven million, five hundred thousand, five hundred thirteen".