131831573 has 2 divisors, whose sum is σ = 131831574. Its totient is φ = 131831572.

The previous prime is 131831551. The next prime is 131831587. The reversal of 131831573 is 375138131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125395204 + 6436369 = 11198^2 + 2537^2 .

It is an emirp because it is prime and its reverse (375138131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131831573 - 2¹² = 131827477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130831573) 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, 65915786 + 65915787.

It is an arithmetic number, because the mean of its divisors is an integer number (65915787).

Almost surely, 2^131831573 is an apocalyptic number.

It is an amenable number.

131831573 is a deficient number, since it is larger than the sum of its proper divisors (1).

131831573 is an equidigital number, since it uses as much as digits as its factorization.

131831573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 131831573 is about 11481.7931090923. The cubic root of 131831573 is about 508.9476866581.

The spelling of 131831573 in words is "one hundred thirty-one million, eight hundred thirty-one thousand, five hundred seventy-three".