6856551 has 12 divisors (see below), whose sum is σ = 10665928. Its totient is φ = 4219344.

The previous prime is 6856543. The next prime is 6856561. The reversal of 6856551 is 1556586.

It is not a de Polignac number, because 6856551 - 2³ = 6856543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29185 + ... + 29418.

Almost surely, 2^6856551 is an apocalyptic number.

6856551 is a deficient number, since it is larger than the sum of its proper divisors (3809377).

6856551 is a wasteful number, since it uses less digits than its factorization.

6856551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58622 (or 58619 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 6856551 is about 2618.5016708034. The cubic root of 6856551 is about 189.9773841964.

The spelling of 6856551 in words is "six million, eight hundred fifty-six thousand, five hundred fifty-one".