6403131313 has 4 divisors (see below), whose sum is σ = 6609683968. Its totient is φ = 6196578660.

The previous prime is 6403131307. The next prime is 6403131323. The reversal of 6403131313 is 3131313046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6403131313 - 2²⁹ = 5866260401 is a prime.

It is a super-2 number, since 2×6403131313² = 82000181223042207938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6403131323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103276281 + ... + 103276342.

It is an arithmetic number, because the mean of its divisors is an integer number (1652420992).

Almost surely, 2^6403131313 is an apocalyptic number.

It is an amenable number.

6403131313 is a deficient number, since it is larger than the sum of its proper divisors (206552655).

6403131313 is a wasteful number, since it uses less digits than its factorization.

6403131313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206552654.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 6403131313 is about 80019.5683130070. The cubic root of 6403131313 is about 1856.9382813142.

Adding to 6403131313 its reverse (3131313046), we get a palindrome (9534444359).

The spelling of 6403131313 in words is "six billion, four hundred three million, one hundred thirty-one thousand, three hundred thirteen".