2218955 has 4 divisors (see below), whose sum is σ = 2662752. Its totient is φ = 1775160.

The previous prime is 2218943. The next prime is 2218967. The reversal of 2218955 is 5598122.

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

It is an interprime number because it is at equal distance from previous prime (2218943) and next prime (2218967).

It is not a de Polignac number, because 2218955 - 2¹⁶ = 2153419 is a prime.

It is a super-2 number, since 2×2218955² = 9847522584050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221891 + ... + 221900.

It is an arithmetic number, because the mean of its divisors is an integer number (665688).

2^2218955 is an apocalyptic number.

2218955 is a deficient number, since it is larger than the sum of its proper divisors (443797).

2218955 is an equidigital number, since it uses as much as digits as its factorization.

2218955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443796.

The product of its digits is 7200, while the sum is 32.

The square root of 2218955 is about 1489.6157222586. The cubic root of 2218955 is about 130.4316029579.

It can be divided in two parts, 221 and 8955, that multiplied together give a triangular number (1979055 = T₁₉₈₉).

The spelling of 2218955 in words is "two million, two hundred eighteen thousand, nine hundred fifty-five".