11533521 has 8 divisors (see below), whose sum is σ = 15470784. Its totient is φ = 7642640.

The previous prime is 11533517. The next prime is 11533523. The reversal of 11533521 is 12533511.

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

It is a cyclic number.

It is not a de Polignac number, because 11533521 - 2² = 11533517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11533523) 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, 11010 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (1933848).

Almost surely, 2^11533521 is an apocalyptic number.

It is an amenable number.

11533521 is a deficient number, since it is larger than the sum of its proper divisors (3937263).

11533521 is a wasteful number, since it uses less digits than its factorization.

11533521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23191.

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

The square root of 11533521 is about 3396.1037970003. The cubic root of 11533521 is about 225.9369717470.

The spelling of 11533521 in words is "eleven million, five hundred thirty-three thousand, five hundred twenty-one".