131331534011555 has 4 divisors (see below), whose sum is σ = 157597840813872. Its totient is φ = 105065227209240.

The previous prime is 131331534011549. The next prime is 131331534011563. The reversal of 131331534011555 is 555110435133131.

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

It is not a de Polignac number, because 131331534011555 - 2¹⁰ = 131331534010531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13133153401151 + ... + 13133153401160.

It is an arithmetic number, because the mean of its divisors is an integer number (39399460203468).

Almost surely, 2^{131331534011555} is an apocalyptic number.

131331534011555 is a deficient number, since it is larger than the sum of its proper divisors (26266306802317).

131331534011555 is an equidigital number, since it uses as much as digits as its factorization.

131331534011555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26266306802316.

The product of its (nonzero) digits is 202500, while the sum is 41.

Adding to 131331534011555 its reverse (555110435133131), we get a palindrome (686441969144686).

The spelling of 131331534011555 in words is "one hundred thirty-one trillion, three hundred thirty-one billion, five hundred thirty-four million, eleven thousand, five hundred fifty-five".