131028511511 has 4 divisors (see below), whose sum is σ = 133249333800. Its totient is φ = 128807689224.

The previous prime is 131028511463. The next prime is 131028511529. The reversal of 131028511511 is 115115820131.

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 131028511511 - 2⁶ = 131028511447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131028511571) 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, 1110411056 + ... + 1110411173.

It is an arithmetic number, because the mean of its divisors is an integer number (33312333450).

Almost surely, 2^131028511511 is an apocalyptic number.

131028511511 is a deficient number, since it is larger than the sum of its proper divisors (2220822289).

131028511511 is an equidigital number, since it uses as much as digits as its factorization.

131028511511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220822288.

The product of its (nonzero) digits is 1200, while the sum is 29.

The spelling of 131028511511 in words is "one hundred thirty-one billion, twenty-eight million, five hundred eleven thousand, five hundred eleven".