131591563 has 2 divisors, whose sum is σ = 131591564. Its totient is φ = 131591562.

The previous prime is 131591557. The next prime is 131591569. The reversal of 131591563 is 365195131.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (131591557) and next prime (131591569).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131591563 is a prime.

It is not a weakly prime, because it can be changed into another prime (131591569) 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, 65795781 + 65795782.

It is an arithmetic number, because the mean of its divisors is an integer number (65795782).

Almost surely, 2^131591563 is an apocalyptic number.

131591563 is a deficient number, since it is larger than the sum of its proper divisors (1).

131591563 is an equidigital number, since it uses as much as digits as its factorization.

131591563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 34.

The square root of 131591563 is about 11471.3365829793. The cubic root of 131591563 is about 508.6386389440.

The spelling of 131591563 in words is "one hundred thirty-one million, five hundred ninety-one thousand, five hundred sixty-three".