6520941331 has 4 divisors (see below), whose sum is σ = 6521636464. Its totient is φ = 6520246200.

The previous prime is 6520941289. The next prime is 6520941353. The reversal of 6520941331 is 1331490256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6520941331 - 2⁹ = 6520940819 is a prime.

It is a super-2 number, since 2×6520941331² = 85045351684688103122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6520941431) 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, 333300 + ... + 352321.

It is an arithmetic number, because the mean of its divisors is an integer number (1630409116).

Almost surely, 2^6520941331 is an apocalyptic number.

6520941331 is a deficient number, since it is larger than the sum of its proper divisors (695133).

6520941331 is an equidigital number, since it uses as much as digits as its factorization.

6520941331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695132.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 6520941331 is about 80752.3456687173. The cubic root of 6520941331 is about 1868.2576286737.

The spelling of 6520941331 in words is "six billion, five hundred twenty million, nine hundred forty-one thousand, three hundred thirty-one".