131344451540 has 24 divisors (see below), whose sum is σ = 275903837160. Its totient is φ = 52522449408.

The previous prime is 131344451507. The next prime is 131344451593. The reversal of 131344451540 is 45154443131.

It can be written as a sum of positive squares in 4 ways, for example, as 13392044176 + 117952407364 = 115724^2 + 343442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131344451540.

It is a congruent number.

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, 887825 + ... + 1025144.

It is an arithmetic number, because the mean of its divisors is an integer number (11495993215).

Almost surely, 2^131344451540 is an apocalyptic number.

131344451540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131344451540 is an abundant number, since it is smaller than the sum of its proper divisors (144559385620).

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

131344451540 is a wasteful number, since it uses less digits than its factorization.

131344451540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916411 (or 1916409 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 131344451540 its reverse (45154443131), we get a palindrome (176498894671).

The spelling of 131344451540 in words is "one hundred thirty-one billion, three hundred forty-four million, four hundred fifty-one thousand, five hundred forty".