8131516 has 6 divisors (see below), whose sum is σ = 14230160. Its totient is φ = 4065756.

The previous prime is 8131511. The next prime is 8131523. The reversal of 8131516 is 6151318.

It is a super-2 number, since 2×8131516² = 132243104916512, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131511) 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, 1016436 + ... + 1016443.

Almost surely, 2^8131516 is an apocalyptic number.

It is an amenable number.

8131516 is a deficient number, since it is larger than the sum of its proper divisors (6098644).

8131516 is a wasteful number, since it uses less digits than its factorization.

8131516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032883 (or 2032881 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 8131516 is about 2851.5813156913. The cubic root of 8131516 is about 201.0900152085.

The spelling of 8131516 in words is "eight million, one hundred thirty-one thousand, five hundred sixteen".