11543531 has 4 divisors (see below), whose sum is σ = 11608200. Its totient is φ = 11478864.

The previous prime is 11543503. The next prime is 11543549. The reversal of 11543531 is 13534511.

11543531 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11543531 - 2¹⁴ = 11527147 is a prime.

It is a super-2 number, since 2×11543531² = 266506215895922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11543497 and 11543506.

It is not an unprimeable number, because it can be changed into a prime (11543551) 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, 32066 + ... + 32423.

It is an arithmetic number, because the mean of its divisors is an integer number (2902050).

Almost surely, 2^11543531 is an apocalyptic number.

11543531 is a deficient number, since it is larger than the sum of its proper divisors (64669).

11543531 is an equidigital number, since it uses as much as digits as its factorization.

11543531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64668.

The product of its digits is 900, while the sum is 23.

The square root of 11543531 is about 3397.5772250237. The cubic root of 11543531 is about 226.0023167852.

The spelling of 11543531 in words is "eleven million, five hundred forty-three thousand, five hundred thirty-one".