2216661238 has 16 divisors (see below), whose sum is σ = 3628048320. Its totient is φ = 1007355400.

The previous prime is 2216661221. The next prime is 2216661247. The reversal of 2216661238 is 8321666122.

It is a junction number, because it is equal to n+sod(n) for n = 2216661197 and 2216661206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138933 + ... + 154063.

It is an arithmetic number, because the mean of its divisors is an integer number (226753020).

Almost surely, 2^2216661238 is an apocalyptic number.

2216661238 is a deficient number, since it is larger than the sum of its proper divisors (1411387082).

2216661238 is a wasteful number, since it uses less digits than its factorization.

2216661238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21803.

The product of its digits is 41472, while the sum is 37.

The square root of 2216661238 is about 47081.4319875681. The cubic root of 2216661238 is about 1303.8664452747.

The spelling of 2216661238 in words is "two billion, two hundred sixteen million, six hundred sixty-one thousand, two hundred thirty-eight".