131261023243 has 8 divisors (see below), whose sum is σ = 150014994912. Its totient is φ = 112507650816.

The previous prime is 131261023171. The next prime is 131261023247. The reversal of 131261023243 is 342320162131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131261023243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131261023247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518121 + ... + 728677.

It is an arithmetic number, because the mean of its divisors is an integer number (18751874364).

Almost surely, 2^131261023243 is an apocalyptic number.

131261023243 is a deficient number, since it is larger than the sum of its proper divisors (18753971669).

131261023243 is an equidigital number, since it uses as much as digits as its factorization.

131261023243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299621.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 131261023243 its reverse (342320162131), we get a palindrome (473581185374).

The spelling of 131261023243 in words is "one hundred thirty-one billion, two hundred sixty-one million, twenty-three thousand, two hundred forty-three".