11544542531 has 4 divisors (see below), whose sum is σ = 11856557232. Its totient is φ = 11232527832.

The previous prime is 11544542491. The next prime is 11544542533. The reversal of 11544542531 is 13524544511.

It is a happy number.

11544542531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13524544511 = 137 ⋅98719303.

It is a cyclic number.

It is not a de Polignac number, because 11544542531 - 2¹⁸ = 11544280387 is a prime.

It is a super-2 number, since 2×11544542531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11544542491 and 11544542500.

It is not an unprimeable number, because it can be changed into a prime (11544542533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156007295 + ... + 156007368.

It is an arithmetic number, because the mean of its divisors is an integer number (2964139308).

Almost surely, 2^11544542531 is an apocalyptic number.

11544542531 is a deficient number, since it is larger than the sum of its proper divisors (312014701).

11544542531 is an equidigital number, since it uses as much as digits as its factorization.

11544542531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312014700.

The product of its digits is 48000, while the sum is 35.

The spelling of 11544542531 in words is "eleven billion, five hundred forty-four million, five hundred forty-two thousand, five hundred thirty-one".