2218906939 has 8 divisors (see below), whose sum is σ = 2237403168. Its totient is φ = 2200484160.

The previous prime is 2218906897. The next prime is 2218906967. The reversal of 2218906939 is 9396098122.

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

It is a cyclic number.

It is not a de Polignac number, because 2218906939 - 2³¹ = 71423291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2218906892 and 2218906901.

It is not an unprimeable number, because it can be changed into a prime (2218906999) 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, 43159 + ... + 79375.

It is an arithmetic number, because the mean of its divisors is an integer number (279675396).

Almost surely, 2^2218906939 is an apocalyptic number.

2218906939 is a deficient number, since it is larger than the sum of its proper divisors (18496229).

2218906939 is a wasteful number, since it uses less digits than its factorization.

2218906939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36725.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 2218906939 is about 47105.2750655380. The cubic root of 2218906939 is about 1304.3066126561.

The spelling of 2218906939 in words is "two billion, two hundred eighteen million, nine hundred six thousand, nine hundred thirty-nine".