851286131 has 4 divisors (see below), whose sum is σ = 851347032. Its totient is φ = 851225232.

The previous prime is 851286119. The next prime is 851286151. The reversal of 851286131 is 131682158.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851286131 is a prime.

It is a super-2 number, since 2×851286131² = 1449376153665898322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 851286091 and 851286100.

It is not an unprimeable number, because it can be changed into a prime (851286151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156 + ... + 41318.

It is an arithmetic number, because the mean of its divisors is an integer number (212836758).

Almost surely, 2^851286131 is an apocalyptic number.

851286131 is a deficient number, since it is larger than the sum of its proper divisors (60901).

851286131 is a wasteful number, since it uses less digits than its factorization.

851286131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60900.

The product of its digits is 11520, while the sum is 35.

The square root of 851286131 is about 29176.8081016413. The cubic root of 851286131 is about 947.7457654556.

The spelling of 851286131 in words is "eight hundred fifty-one million, two hundred eighty-six thousand, one hundred thirty-one".