11513523 has 8 divisors (see below), whose sum is σ = 17544448. Its totient is φ = 6579144.

The previous prime is 11513507. The next prime is 11513527. The reversal of 11513523 is 32531511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11513523 - 2⁴ = 11513507 is a prime.

It is a super-2 number, since 2×11513523² = 265122423743058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 548263 = 11513523 / (1 + 1 + 5 + 1 + 3 + 5 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11513523.

It is not an unprimeable number, because it can be changed into a prime (11513527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274111 + ... + 274152.

It is an arithmetic number, because the mean of its divisors is an integer number (2193056).

Almost surely, 2^11513523 is an apocalyptic number.

11513523 is a deficient number, since it is larger than the sum of its proper divisors (6030925).

11513523 is an equidigital number, since it uses as much as digits as its factorization.

11513523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548273.

The product of its digits is 450, while the sum is 21.

The square root of 11513523 is about 3393.1582633293. The cubic root of 11513523 is about 225.8063119799.

The spelling of 11513523 in words is "eleven million, five hundred thirteen thousand, five hundred twenty-three".