6431313 has 8 divisors (see below), whose sum is σ = 9800128. Its totient is φ = 3675024.

The previous prime is 6431309. The next prime is 6431323. The reversal of 6431313 is 3131346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6431313 - 2² = 6431309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 306253 = 6431313 / (6 + 4 + 3 + 1 + 3 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

6431313 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6431313.

It is not an unprimeable number, because it can be changed into a prime (6431323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153106 + ... + 153147.

It is an arithmetic number, because the mean of its divisors is an integer number (1225016).

Almost surely, 2^6431313 is an apocalyptic number.

It is an amenable number.

6431313 is a deficient number, since it is larger than the sum of its proper divisors (3368815).

6431313 is a wasteful number, since it uses less digits than its factorization.

6431313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306263.

The product of its digits is 648, while the sum is 21.

The square root of 6431313 is about 2536.0033517328. The cubic root of 6431313 is about 185.9658568384.

Adding to 6431313 its reverse (3131346), we get a palindrome (9562659).

The spelling of 6431313 in words is "six million, four hundred thirty-one thousand, three hundred thirteen".