6551218 has 4 divisors (see below), whose sum is σ = 9826830. Its totient is φ = 3275608.

The previous prime is 6551213. The next prime is 6551231. The reversal of 6551218 is 8121556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6487209 + 64009 = 2547^2 + 253^2 .

It is not an unprimeable number, because it can be changed into a prime (6551213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1637803 + ... + 1637806.

Almost surely, 2^6551218 is an apocalyptic number.

6551218 is a deficient number, since it is larger than the sum of its proper divisors (3275612).

6551218 is a wasteful number, since it uses less digits than its factorization.

6551218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275611.

The product of its digits is 2400, while the sum is 28.

The square root of 6551218 is about 2559.5347233433. The cubic root of 6551218 is about 187.1144599388.

The spelling of 6551218 in words is "six million, five hundred fifty-one thousand, two hundred eighteen".