51286131 has 24 divisors (see below), whose sum is σ = 80618720. Its totient is φ = 31228416.

The previous prime is 51286129. The next prime is 51286141. The reversal of 51286131 is 13168215.

It is not a de Polignac number, because 51286131 - 2¹ = 51286129 is a prime.

It is a super-2 number, since 2×51286131² = 5260534465898322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51286095 and 51286104.

It is not an unprimeable number, because it can be changed into a prime (51286141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9090 + ... + 13608.

Almost surely, 2^51286131 is an apocalyptic number.

51286131 is a deficient number, since it is larger than the sum of its proper divisors (29332589).

51286131 is a wasteful number, since it uses less digits than its factorization.

51286131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635 (or 4632 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 51286131 is about 7161.4335855330. The cubic root of 51286131 is about 371.5352112298.

The spelling of 51286131 in words is "fifty-one million, two hundred eighty-six thousand, one hundred thirty-one".