131161573 has 2 divisors, whose sum is σ = 131161574. Its totient is φ = 131161572.

The previous prime is 131161549. The next prime is 131161607. The reversal of 131161573 is 375161131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102880449 + 28281124 = 10143^2 + 5318^2 .

It is an emirp because it is prime and its reverse (375161131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131161573 - 2¹³ = 131153381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131161073) 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 as a sum of consecutive naturals, namely, 65580786 + 65580787.

It is an arithmetic number, because the mean of its divisors is an integer number (65580787).

Almost surely, 2^131161573 is an apocalyptic number.

It is an amenable number.

131161573 is a deficient number, since it is larger than the sum of its proper divisors (1).

131161573 is an equidigital number, since it uses as much as digits as its factorization.

131161573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 28.

The square root of 131161573 is about 11452.5793164684. The cubic root of 131161573 is about 508.0840233948.

The spelling of 131161573 in words is "one hundred thirty-one million, one hundred sixty-one thousand, five hundred seventy-three".