6521131 has 2 divisors, whose sum is σ = 6521132. Its totient is φ = 6521130.

The previous prime is 6521111. The next prime is 6521153. The reversal of 6521131 is 1311256.

6521131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6521131 - 2⁷ = 6521003 is a prime.

It is a super-2 number, since 2×6521131² = 85050299038322, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₄₆₁₂₂ and since 6521131 and 446122 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 6521099 and 6521108.

It is not a weakly prime, because it can be changed into another prime (6521101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260565 + 3260566.

It is an arithmetic number, because the mean of its divisors is an integer number (3260566).

Almost surely, 2^6521131 is an apocalyptic number.

6521131 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521131 is an equidigital number, since it uses as much as digits as its factorization.

6521131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 6521131 is about 2553.6505242495. The cubic root of 6521131 is about 186.8275741965.

Adding to 6521131 its reverse (1311256), we get a palindrome (7832387).

The spelling of 6521131 in words is "six million, five hundred twenty-one thousand, one hundred thirty-one".