315040431 has 4 divisors (see below), whose sum is σ = 420053912. Its totient is φ = 210026952.

The previous prime is 315040399. The next prime is 315040457. The reversal of 315040431 is 134040513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134040513 = 3 ⋅44680171.

It is not a de Polignac number, because 315040431 - 2⁵ = 315040399 is a prime.

It is a super-2 number, since 2×315040431² = 198500946329331522, 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 = 315040398 and 315040407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315040031) 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, 52506736 + ... + 52506741.

It is an arithmetic number, because the mean of its divisors is an integer number (105013478).

Almost surely, 2^315040431 is an apocalyptic number.

315040431 is a deficient number, since it is larger than the sum of its proper divisors (105013481).

315040431 is a wasteful number, since it uses less digits than its factorization.

315040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105013480.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 315040431 is about 17749.3783271415. The cubic root of 315040431 is about 680.4383210641.

Adding to 315040431 its reverse (134040513), we get a palindrome (449080944).

The spelling of 315040431 in words is "three hundred fifteen million, forty thousand, four hundred thirty-one".