131125591 has 2 divisors, whose sum is σ = 131125592. Its totient is φ = 131125590.

The previous prime is 131125571. The next prime is 131125597. The reversal of 131125591 is 195521131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131125591 - 2¹⁷ = 130994519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131125597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65562795 + 65562796.

It is an arithmetic number, because the mean of its divisors is an integer number (65562796).

Almost surely, 2^131125591 is an apocalyptic number.

131125591 is a deficient number, since it is larger than the sum of its proper divisors (1).

131125591 is an equidigital number, since it uses as much as digits as its factorization.

131125591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 28.

The square root of 131125591 is about 11451.0082962157. The cubic root of 131125591 is about 508.0375576733.

The spelling of 131125591 in words is "one hundred thirty-one million, one hundred twenty-five thousand, five hundred ninety-one".