631313 has 8 divisors (see below), whose sum is σ = 672000. Its totient is φ = 591408.

The previous prime is 631307. The next prime is 631339. The reversal of 631313 is 313136.

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

It is a cyclic number.

It is not a de Polignac number, because 631313 - 2⁶ = 631249 is a prime.

It is a super-2 number, since 2×631313² = 797112207938, 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 = 631291 and 631300.

It is not an unprimeable number, because it can be changed into a prime (631013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720 + ... + 2942.

It is an arithmetic number, because the mean of its divisors is an integer number (84000).

2⁶³¹³¹³ is an apocalyptic number.

It is an amenable number.

631313 is a deficient number, since it is larger than the sum of its proper divisors (40687).

631313 is a wasteful number, since it uses less digits than its factorization.

631313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its digits is 162, while the sum is 17.

The square root of 631313 is about 794.5520750712. The cubic root of 631313 is about 85.7857022522.

Adding to 631313 its reverse (313136), we get a palindrome (944449).

The spelling of 631313 in words is "six hundred thirty-one thousand, three hundred thirteen".