131261238530 has 8 divisors (see below), whose sum is σ = 236270229372. Its totient is φ = 52504495408.

The previous prime is 131261238481. The next prime is 131261238539. The reversal of 131261238530 is 35832162131.

It can be written as a sum of positive squares in 2 ways, for example, as 125214776449 + 6046462081 = 353857^2 + 77759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (131261238539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6563061917 + ... + 6563061936.

Almost surely, 2^131261238530 is an apocalyptic number.

131261238530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131261238530 is a deficient number, since it is larger than the sum of its proper divisors (105008990842).

131261238530 is a wasteful number, since it uses less digits than its factorization.

131261238530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13126123860.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 131261238530 in words is "one hundred thirty-one billion, two hundred sixty-one million, two hundred thirty-eight thousand, five hundred thirty".