6541551 has 6 divisors (see below), whose sum is σ = 9448920. Its totient is φ = 4361028.

The previous prime is 6541541. The next prime is 6541571. The reversal of 6541551 is 1551456.

It is a happy number.

6541551 is a `hidden beast` number, since 654 + 1 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 6541551 - 2⁵ = 6541519 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363411 + ... + 363428.

It is an arithmetic number, because the mean of its divisors is an integer number (1574820).

Almost surely, 2^6541551 is an apocalyptic number.

6541551 is a deficient number, since it is larger than the sum of its proper divisors (2907369).

6541551 is a wasteful number, since it uses less digits than its factorization.

6541551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726845 (or 726842 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 6541551 is about 2557.6455970286. The cubic root of 6541551 is about 187.0223790503.

It can be divided in two parts, 65 and 41551, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 6541551 in words is "six million, five hundred forty-one thousand, five hundred fifty-one".