8131507 has 2 divisors, whose sum is σ = 8131508. Its totient is φ = 8131506.

The previous prime is 8131499. The next prime is 8131511. The reversal of 8131507 is 7051318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8131507 - 2³ = 8131499 is a prime.

It is a super-2 number, since 2×8131507² = 132242812182098, which contains 22 as substring.

It is equal to p₅₄₈₀₁₇ and since 8131507 and 548017 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8131567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065753 + 4065754.

It is an arithmetic number, because the mean of its divisors is an integer number (4065754).

Almost surely, 2^8131507 is an apocalyptic number.

8131507 is a deficient number, since it is larger than the sum of its proper divisors (1).

8131507 is an equidigital number, since it uses as much as digits as its factorization.

8131507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 8131507 is about 2851.5797376191. The cubic root of 8131507 is about 201.0899410194.

The spelling of 8131507 in words is "eight million, one hundred thirty-one thousand, five hundred seven".