312500131 has 4 divisors (see below), whose sum is σ = 313264600. Its totient is φ = 311735664.

The previous prime is 312500129. The next prime is 312500141. The reversal of 312500131 is 131005213.

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 312500131 - 2¹ = 312500129 is a prime.

It is a super-2 number, since 2×312500131² = 195312663750034322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312500101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381621 + ... + 382438.

It is an arithmetic number, because the mean of its divisors is an integer number (78316150).

Almost surely, 2^312500131 is an apocalyptic number.

312500131 is a deficient number, since it is larger than the sum of its proper divisors (764469).

312500131 is an equidigital number, since it uses as much as digits as its factorization.

312500131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764468.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 312500131 is about 17677.6732349028. The cubic root of 312500131 is about 678.6044989724.

Adding to 312500131 its reverse (131005213), we get a palindrome (443505344).

The spelling of 312500131 in words is "three hundred twelve million, five hundred thousand, one hundred thirty-one".