131344431241220 has 24 divisors (see below), whose sum is σ = 275836231075608. Its totient is φ = 52535310502400.

The previous prime is 131344431241193. The next prime is 131344431241291. The reversal of 131344431241220 is 22142134443131.

It can be written as a sum of positive squares in 4 ways, for example, as 50160871364356 + 81183559876864 = 7082434^2 + 9010192^2 .

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, 153437141 + ... + 154290780.

It is an arithmetic number, because the mean of its divisors is an integer number (11493176294817).

Almost surely, 2^{131344431241220} is an apocalyptic number.

131344431241220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131344431241220 is an abundant number, since it is smaller than the sum of its proper divisors (144491799834388).

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

131344431241220 is a wasteful number, since it uses less digits than its factorization.

131344431241220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307749271 (or 307749269 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 131344431241220 its reverse (22142134443131), we get a palindrome (153486565684351).

The spelling of 131344431241220 in words is "one hundred thirty-one trillion, three hundred forty-four billion, four hundred thirty-one million, two hundred forty-one thousand, two hundred twenty".