131517247 has 2 divisors, whose sum is σ = 131517248. Its totient is φ = 131517246.

The previous prime is 131517193. The next prime is 131517293. The reversal of 131517247 is 742715131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131517247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131317247) 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, 65758623 + 65758624.

It is an arithmetic number, because the mean of its divisors is an integer number (65758624).

Almost surely, 2^131517247 is an apocalyptic number.

131517247 is a deficient number, since it is larger than the sum of its proper divisors (1).

131517247 is an equidigital number, since it uses as much as digits as its factorization.

131517247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 131517247 is about 11468.0969214600. The cubic root of 131517247 is about 508.5428701215.

The spelling of 131517247 in words is "one hundred thirty-one million, five hundred seventeen thousand, two hundred forty-seven".