318486131 has 4 divisors (see below), whose sum is σ = 319388712. Its totient is φ = 317583552.

The previous prime is 318486107. The next prime is 318486137. The reversal of 318486131 is 131684813.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 318486131 - 2⁶ = 318486067 is a prime.

It is a super-2 number, since 2×318486131² = 202866831278698322, 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 = 318486091 and 318486100.

It is not an unprimeable number, because it can be changed into a prime (318486137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450761 + ... + 451466.

It is an arithmetic number, because the mean of its divisors is an integer number (79847178).

Almost surely, 2^318486131 is an apocalyptic number.

318486131 is a deficient number, since it is larger than the sum of its proper divisors (902581).

318486131 is an equidigital number, since it uses as much as digits as its factorization.

318486131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902580.

The product of its digits is 13824, while the sum is 35.

The square root of 318486131 is about 17846.1797312478. The cubic root of 318486131 is about 682.9100567750.

The spelling of 318486131 in words is "three hundred eighteen million, four hundred eighty-six thousand, one hundred thirty-one".