11525043231 has 32 divisors (see below), whose sum is σ = 18493917120. Its totient is φ = 7051300992.

The previous prime is 11525043209. The next prime is 11525043247. The reversal of 11525043231 is 13234052511.

11525043231 is a `hidden beast` number, since 1 + 152 + 50 + 432 + 31 = 666.

It is not a de Polignac number, because 11525043231 - 2⁹ = 11525042719 is a prime.

It is a super-2 number, since 2×11525043231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 11525043195 and 11525043204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11525043931) 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 31 ways as a sum of consecutive naturals, for example, 34176 + ... + 155621.

It is an arithmetic number, because the mean of its divisors is an integer number (577934910).

Almost surely, 2^11525043231 is an apocalyptic number.

11525043231 is a deficient number, since it is larger than the sum of its proper divisors (6968873889).

11525043231 is a wasteful number, since it uses less digits than its factorization.

11525043231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189992 (or 189986 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 11525043231 its reverse (13234052511), we get a palindrome (24759095742).

The spelling of 11525043231 in words is "eleven billion, five hundred twenty-five million, forty-three thousand, two hundred thirty-one".