312500431 has 4 divisors (see below), whose sum is σ = 312536272. Its totient is φ = 312464592.

The previous prime is 312500413. The next prime is 312500473. The reversal of 312500431 is 134005213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 134005213 = 2293 ⋅58441.

It is a cyclic number.

It is not a de Polignac number, because 312500431 - 2²³ = 304111823 is a prime.

It is a super-2 number, since 2×312500431² = 195313038750371522, 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 = 312500399 and 312500408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312500411) 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, 4555 + ... + 25411.

It is an arithmetic number, because the mean of its divisors is an integer number (78134068).

Almost surely, 2^312500431 is an apocalyptic number.

312500431 is a deficient number, since it is larger than the sum of its proper divisors (35841).

312500431 is a wasteful number, since it uses less digits than its factorization.

312500431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35840.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 312500431 is about 17677.6817201804. The cubic root of 312500431 is about 678.6047161256.

Adding to 312500431 its reverse (134005213), we get a palindrome (446505644).

The spelling of 312500431 in words is "three hundred twelve million, five hundred thousand, four hundred thirty-one".