131503756106 has 4 divisors (see below), whose sum is σ = 197255634162. Its totient is φ = 65751878052.

The previous prime is 131503756103. The next prime is 131503756117. The reversal of 131503756106 is 601657305131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601657305131 = 75011 ⋅8020921.

It can be written as a sum of positive squares in only one way, i.e., 114761725225 + 16742030881 = 338765^2 + 129391^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131503756106.

It is not an unprimeable number, because it can be changed into a prime (131503756103) 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 as a sum of consecutive naturals, namely, 32875939025 + ... + 32875939028.

Almost surely, 2^131503756106 is an apocalyptic number.

131503756106 is a deficient number, since it is larger than the sum of its proper divisors (65751878056).

131503756106 is an equidigital number, since it uses as much as digits as its factorization.

131503756106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65751878055.

The product of its (nonzero) digits is 56700, while the sum is 38.

The spelling of 131503756106 in words is "one hundred thirty-one billion, five hundred three million, seven hundred fifty-six thousand, one hundred six".