11523433531 has 4 divisors (see below), whose sum is σ = 11527686864. Its totient is φ = 11519180200.

The previous prime is 11523433529. The next prime is 11523433543. The reversal of 11523433531 is 13533432511.

It is a happy number.

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 11523433531 - 2¹ = 11523433529 is a prime.

It is a super-2 number, since 2×11523433531² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11523433493 and 11523433502.

It is not an unprimeable number, because it can be changed into a prime (11523403531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122600 + ... + 2128021.

It is an arithmetic number, because the mean of its divisors is an integer number (2881921716).

Almost surely, 2^11523433531 is an apocalyptic number.

11523433531 is a deficient number, since it is larger than the sum of its proper divisors (4253333).

11523433531 is an equidigital number, since it uses as much as digits as its factorization.

11523433531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253332.

The product of its digits is 16200, while the sum is 31.

The spelling of 11523433531 in words is "eleven billion, five hundred twenty-three million, four hundred thirty-three thousand, five hundred thirty-one".