6531161 has 12 divisors (see below), whose sum is σ = 8182692. Its totient is φ = 5167008.

The previous prime is 6531139. The next prime is 6531181. The reversal of 6531161 is 1611356.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 5664400 = 931^2 + 2380^2 .

It is not a de Polignac number, because 6531161 - 2⁶ = 6531097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4490 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (681891).

Almost surely, 2^6531161 is an apocalyptic number.

It is an amenable number.

6531161 is a deficient number, since it is larger than the sum of its proper divisors (1651531).

6531161 is a wasteful number, since it uses less digits than its factorization.

6531161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280 (or 10273 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 6531161 is about 2555.6136249441. The cubic root of 6531161 is about 186.9233101797.

The spelling of 6531161 in words is "six million, five hundred thirty-one thousand, one hundred sixty-one".