2218494621 has 8 divisors (see below), whose sum is σ = 3380563264. Its totient is φ = 1267711200.

The previous prime is 2218494599. The next prime is 2218494643. The reversal of 2218494621 is 1264948122.

It is an interprime number because it is at equal distance from previous prime (2218494599) and next prime (2218494643).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2218494621 - 2⁵ = 2218494589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2218494621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218494661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52821280 + ... + 52821321.

It is an arithmetic number, because the mean of its divisors is an integer number (422570408).

Almost surely, 2^2218494621 is an apocalyptic number.

2218494621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2218494621 is a deficient number, since it is larger than the sum of its proper divisors (1162068643).

2218494621 is a wasteful number, since it uses less digits than its factorization.

2218494621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105642611.

The product of its digits is 55296, while the sum is 39.

The square root of 2218494621 is about 47100.8983035356. The cubic root of 2218494621 is about 1304.2258187603.

The spelling of 2218494621 in words is "two billion, two hundred eighteen million, four hundred ninety-four thousand, six hundred twenty-one".