6541531 has 4 divisors (see below), whose sum is σ = 6547552. Its totient is φ = 6535512.

The previous prime is 6541523. The next prime is 6541541. The reversal of 6541531 is 1351456.

6541531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6541531 - 2³ = 6541523 is a prime.

It is a super-2 number, since 2×6541531² = 85583255647922, which contains 22 as substring.

It is a Duffinian number.

6541531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6541496 and 6541505.

It is not an unprimeable number, because it can be changed into a prime (6541511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876 + ... + 3721.

It is an arithmetic number, because the mean of its divisors is an integer number (1636888).

Almost surely, 2^6541531 is an apocalyptic number.

6541531 is a deficient number, since it is larger than the sum of its proper divisors (6021).

6541531 is a wasteful number, since it uses less digits than its factorization.

6541531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020.

The product of its digits is 1800, while the sum is 25.

The square root of 6541531 is about 2557.6416871798. The cubic root of 6541531 is about 187.0221884507.

Adding to 6541531 its reverse (1351456), we get a palindrome (7892987).

The spelling of 6541531 in words is "six million, five hundred forty-one thousand, five hundred thirty-one".