6313521 has 4 divisors (see below), whose sum is σ = 8418032. Its totient is φ = 4209012.

The previous prime is 6313513. The next prime is 6313583. The reversal of 6313521 is 1253136.

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 not a de Polignac number, because 6313521 - 2³ = 6313513 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6313121) 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, 1052251 + ... + 1052256.

It is an arithmetic number, because the mean of its divisors is an integer number (2104508).

Almost surely, 2^6313521 is an apocalyptic number.

It is an amenable number.

6313521 is a deficient number, since it is larger than the sum of its proper divisors (2104511).

6313521 is a wasteful number, since it uses less digits than its factorization.

6313521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104510.

The product of its digits is 540, while the sum is 21.

The square root of 6313521 is about 2512.6720836591. The cubic root of 6313521 is about 184.8235083285.

Adding to 6313521 its reverse (1253136), we get a palindrome (7566657).

The spelling of 6313521 in words is "six million, three hundred thirteen thousand, five hundred twenty-one".