2218857 has 16 divisors (see below), whose sum is σ = 3165120. Its totient is φ = 1377792.

The previous prime is 2218837. The next prime is 2218861. The reversal of 2218857 is 7588122.

It is not a de Polignac number, because 2218857 - 2¹² = 2214761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2218807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6933 + ... + 7245.

It is an arithmetic number, because the mean of its divisors is an integer number (197820).

2^2218857 is an apocalyptic number.

It is an amenable number.

2218857 is a deficient number, since it is larger than the sum of its proper divisors (946263).

2218857 is a wasteful number, since it uses less digits than its factorization.

2218857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472.

The product of its digits is 8960, while the sum is 33.

The square root of 2218857 is about 1489.5828275057. The cubic root of 2218857 is about 130.4296827620.

The spelling of 2218857 in words is "two million, two hundred eighteen thousand, eight hundred fifty-seven".