6543131 has 4 divisors (see below), whose sum is σ = 7477872. Its totient is φ = 5608392.

The previous prime is 6543127. The next prime is 6543169. The reversal of 6543131 is 1313456.

It is a happy number.

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 6543131 - 2² = 6543127 is a prime.

It is a super-2 number, since 2×6543131² = 85625126566322, 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 = 6543097 and 6543106.

It is not an unprimeable number, because it can be changed into a prime (6543101) 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, 467360 + ... + 467373.

It is an arithmetic number, because the mean of its divisors is an integer number (1869468).

Almost surely, 2^6543131 is an apocalyptic number.

6543131 is a deficient number, since it is larger than the sum of its proper divisors (934741).

6543131 is an equidigital number, since it uses as much as digits as its factorization.

6543131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934740.

The product of its digits is 1080, while the sum is 23.

The square root of 6543131 is about 2557.9544562013. The cubic root of 6543131 is about 187.0374351927.

Adding to 6543131 its reverse (1313456), we get a palindrome (7856587).

The spelling of 6543131 in words is "six million, five hundred forty-three thousand, one hundred thirty-one".