8157131 has 8 divisors (see below), whose sum is σ = 8456064. Its totient is φ = 7862400.

The previous prime is 8157113. The next prime is 8157133. The reversal of 8157131 is 1317518.

8157131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8157131 - 2⁶ = 8157067 is a prime.

It is a super-2 number, since 2×8157131² = 133077572302322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8157131.

It is not an unprimeable number, because it can be changed into a prime (8157133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3206 + ... + 5156.

It is an arithmetic number, because the mean of its divisors is an integer number (1057008).

Almost surely, 2^8157131 is an apocalyptic number.

8157131 is a deficient number, since it is larger than the sum of its proper divisors (298933).

8157131 is a wasteful number, since it uses less digits than its factorization.

8157131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101.

The product of its digits is 840, while the sum is 26.

The square root of 8157131 is about 2856.0691518239. The cubic root of 8157131 is about 201.3009443705.

The spelling of 8157131 in words is "eight million, one hundred fifty-seven thousand, one hundred thirty-one".