131244311440520 has 32 divisors (see below), whose sum is σ = 295569874399320. Its totient is φ = 52449693703680.

The previous prime is 131244311440483. The next prime is 131244311440549. The reversal of 131244311440520 is 25044113442131.

It can be written as a sum of positive squares in 4 ways, for example, as 129550424808484 + 1693886632036 = 11382022^2 + 1301494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500920501 + ... + 1501007940.

Almost surely, 2^{131244311440520} is an apocalyptic number.

131244311440520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131244311440520 is an abundant number, since it is smaller than the sum of its proper divisors (164325562958800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131244311440520 is a wasteful number, since it uses less digits than its factorization.

131244311440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001929545 (or 3001929541 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 131244311440520 its reverse (25044113442131), we get a palindrome (156288424882651).

The spelling of 131244311440520 in words is "one hundred thirty-one trillion, two hundred forty-four billion, three hundred eleven million, four hundred forty thousand, five hundred twenty".