6541631 has 4 divisors (see below), whose sum is σ = 6665112. Its totient is φ = 6418152.

The previous prime is 6541621. The next prime is 6541663. The reversal of 6541631 is 1361456.

6541631 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6541631 is a prime.

It is a super-2 number, since 2×6541631² = 85585872280322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 6541631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6541621) 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, 61661 + ... + 61766.

It is an arithmetic number, because the mean of its divisors is an integer number (1666278).

Almost surely, 2^6541631 is an apocalyptic number.

6541631 is a deficient number, since it is larger than the sum of its proper divisors (123481).

6541631 is a wasteful number, since it uses less digits than its factorization.

6541631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123480.

The product of its digits is 2160, while the sum is 26.

The square root of 6541631 is about 2557.6612363642. The cubic root of 6541631 is about 187.0231414449.

The spelling of 6541631 in words is "six million, five hundred forty-one thousand, six hundred thirty-one".