8157513 has 16 divisors (see below), whose sum is σ = 13387136. Its totient is φ = 4302720.

The previous prime is 8157509. The next prime is 8157521. The reversal of 8157513 is 3157518.

It is not a de Polignac number, because 8157513 - 2² = 8157509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8157503) 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 in 15 ways as a sum of consecutive naturals, for example, 14668 + ... + 15213.

It is an arithmetic number, because the mean of its divisors is an integer number (836696).

Almost surely, 2^8157513 is an apocalyptic number.

It is an amenable number.

8157513 is a deficient number, since it is larger than the sum of its proper divisors (5229623).

8157513 is a wasteful number, since it uses less digits than its factorization.

8157513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29904.

The product of its digits is 4200, while the sum is 30.

The square root of 8157513 is about 2856.1360261724. The cubic root of 8157513 is about 201.3040866419.

The spelling of 8157513 in words is "eight million, one hundred fifty-seven thousand, five hundred thirteen".