131005471 has 2 divisors, whose sum is σ = 131005472. Its totient is φ = 131005470.

The previous prime is 131005439. The next prime is 131005487. The reversal of 131005471 is 174500131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131005471 - 2⁵ = 131005439 is a prime.

It is a super-3 number, since 3×131005471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131002471) 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, 65502735 + 65502736.

It is an arithmetic number, because the mean of its divisors is an integer number (65502736).

Almost surely, 2^131005471 is an apocalyptic number.

131005471 is a deficient number, since it is larger than the sum of its proper divisors (1).

131005471 is an equidigital number, since it uses as much as digits as its factorization.

131005471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 131005471 is about 11445.7621415090. The cubic root of 131005471 is about 507.8823779077.

The spelling of 131005471 in words is "one hundred thirty-one million, five thousand, four hundred seventy-one".