11551532115131 has 4 divisors (see below), whose sum is σ = 11551539717672. Its totient is φ = 11551524512592.

The previous prime is 11551532115127. The next prime is 11551532115187. The reversal of 11551532115131 is 13151123515511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11551532115131 - 2² = 11551532115127 is a prime.

It is a super-2 number, since 2×11551532115131² (a number of 27 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 = 11551532115091 and 11551532115100.

It is not an unprimeable number, because it can be changed into a prime (11551532115731) 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, 652946 + ... + 4850711.

It is an arithmetic number, because the mean of its divisors is an integer number (2887884929418).

Almost surely, 2^{11551532115131} is an apocalyptic number.

11551532115131 is a deficient number, since it is larger than the sum of its proper divisors (7602541).

11551532115131 is an equidigital number, since it uses as much as digits as its factorization.

11551532115131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602540.

The product of its digits is 11250, while the sum is 35.

The spelling of 11551532115131 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty-two million, one hundred fifteen thousand, one hundred thirty-one".