131371601 has 2 divisors, whose sum is σ = 131371602. Its totient is φ = 131371600.

The previous prime is 131371589. The next prime is 131371621. The reversal of 131371601 is 106173131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108139201 + 23232400 = 10399^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131371601 is a prime.

It is not a weakly prime, because it can be changed into another prime (131371621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65685800 + 65685801.

It is an arithmetic number, because the mean of its divisors is an integer number (65685801).

Almost surely, 2^131371601 is an apocalyptic number.

It is an amenable number.

131371601 is a deficient number, since it is larger than the sum of its proper divisors (1).

131371601 is an equidigital number, since it uses as much as digits as its factorization.

131371601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 131371601 is about 11461.7451114566. The cubic root of 131371601 is about 508.3550757579.

The spelling of 131371601 in words is "one hundred thirty-one million, three hundred seventy-one thousand, six hundred one".