131311550545 has 16 divisors (see below), whose sum is σ = 184476716928. Its totient is φ = 87846053760.

The previous prime is 131311550507. The next prime is 131311550581. The reversal of 131311550545 is 545055113131.

It is not a de Polignac number, because 131311550545 - 2³¹ = 129164066897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131311550545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45751719 + ... + 45754588.

It is an arithmetic number, because the mean of its divisors is an integer number (11529794808).

Almost surely, 2^131311550545 is an apocalyptic number.

It is an amenable number.

131311550545 is a deficient number, since it is larger than the sum of its proper divisors (53165166383).

131311550545 is an equidigital number, since it uses as much as digits as its factorization.

131311550545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91506360.

The product of its (nonzero) digits is 22500, while the sum is 34.

Adding to 131311550545 its reverse (545055113131), we get a palindrome (676366663676).

The spelling of 131311550545 in words is "one hundred thirty-one billion, three hundred eleven million, five hundred fifty thousand, five hundred forty-five".