131115520161535 has 64 divisors (see below), whose sum is σ = 199160976559104. Its totient is φ = 80645028480000.

The previous prime is 131115520161523. The next prime is 131115520161631. The reversal of 131115520161535 is 535161025511131.

It is not a de Polignac number, because 131115520161535 - 2⁷ = 131115520161407 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9318469 + ... + 18683278.

It is an arithmetic number, because the mean of its divisors is an integer number (3111890258736).

Almost surely, 2^{131115520161535} is an apocalyptic number.

131115520161535 is a deficient number, since it is larger than the sum of its proper divisors (68045456397569).

131115520161535 is a wasteful number, since it uses less digits than its factorization.

131115520161535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28002064.

The product of its (nonzero) digits is 67500, while the sum is 40.

Adding to 131115520161535 its reverse (535161025511131), we get a palindrome (666276545672666).

The spelling of 131115520161535 in words is "one hundred thirty-one trillion, one hundred fifteen billion, five hundred twenty million, one hundred sixty-one thousand, five hundred thirty-five".