11532551 has 4 divisors (see below), whose sum is σ = 11543112. Its totient is φ = 11521992.

The previous prime is 11532539. The next prime is 11532559. The reversal of 11532551 is 15523511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15523511 = 71 ⋅218641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11532551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11532559) 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, 3425 + ... + 5898.

It is an arithmetic number, because the mean of its divisors is an integer number (2885778).

Almost surely, 2^11532551 is an apocalyptic number.

11532551 is a deficient number, since it is larger than the sum of its proper divisors (10561).

11532551 is an equidigital number, since it uses as much as digits as its factorization.

11532551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560.

The product of its digits is 750, while the sum is 23.

The square root of 11532551 is about 3395.9609832859. The cubic root of 11532551 is about 225.9306376013.

The spelling of 11532551 in words is "eleven million, five hundred thirty-two thousand, five hundred fifty-one".