131502570820 has 12 divisors (see below), whose sum is σ = 276155398764. Its totient is φ = 52601028320.

The previous prime is 131502570769. The next prime is 131502570853. The reversal of 131502570820 is 28075205131.

It can be written as a sum of positive squares in 2 ways, for example, as 69098533956 + 62404036864 = 262866^2 + 249808^2 .

It is a super-2 number, since 2×131502570820² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3287564251 + ... + 3287564290.

It is an arithmetic number, because the mean of its divisors is an integer number (23012949897).

Almost surely, 2^131502570820 is an apocalyptic number.

131502570820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131502570820 is an abundant number, since it is smaller than the sum of its proper divisors (144652827944).

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

131502570820 is a wasteful number, since it uses less digits than its factorization.

131502570820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6575128550 (or 6575128548 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 131502570820 its reverse (28075205131), we get a palindrome (159577775951).

The spelling of 131502570820 in words is "one hundred thirty-one billion, five hundred two million, five hundred seventy thousand, eight hundred twenty".