131551799 has 2 divisors, whose sum is σ = 131551800. Its totient is φ = 131551798.

The previous prime is 131551747. The next prime is 131551813. The reversal of 131551799 is 997155131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131551799 - 2²⁰ = 130503223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131551999) 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, 65775899 + 65775900.

It is an arithmetic number, because the mean of its divisors is an integer number (65775900).

Almost surely, 2^131551799 is an apocalyptic number.

131551799 is a deficient number, since it is larger than the sum of its proper divisors (1).

131551799 is an equidigital number, since it uses as much as digits as its factorization.

131551799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42525, while the sum is 41.

The square root of 131551799 is about 11469.6032625370. The cubic root of 131551799 is about 508.5874007442.

The spelling of 131551799 in words is "one hundred thirty-one million, five hundred fifty-one thousand, seven hundred ninety-nine".