11131034531 has 4 divisors (see below), whose sum is σ = 11133486000. Its totient is φ = 11128583064.

The previous prime is 11131034503. The next prime is 11131034543. The reversal of 11131034531 is 13543013111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131034531 is a prime.

It is a super-2 number, since 2×11131034531² (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 = 11131034497 and 11131034506.

It is not an unprimeable number, because it can be changed into a prime (11131034731) 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, 1218911 + ... + 1228008.

It is an arithmetic number, because the mean of its divisors is an integer number (2783371500).

Almost surely, 2^11131034531 is an apocalyptic number.

11131034531 is a deficient number, since it is larger than the sum of its proper divisors (2451469).

11131034531 is an equidigital number, since it uses as much as digits as its factorization.

11131034531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451468.

The product of its (nonzero) digits is 540, while the sum is 23.

Adding to 11131034531 its reverse (13543013111), we get a palindrome (24674047642).

The spelling of 11131034531 in words is "eleven billion, one hundred thirty-one million, thirty-four thousand, five hundred thirty-one".