2218181983 has 2 divisors, whose sum is σ = 2218181984. Its totient is φ = 2218181982.

The previous prime is 2218181963. The next prime is 2218182053. The reversal of 2218181983 is 3891818122.

It is a happy number.

2218181983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2218181983 - 2⁵ = 2218181951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218181963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109090991 + 1109090992.

It is an arithmetic number, because the mean of its divisors is an integer number (1109090992).

Almost surely, 2^2218181983 is an apocalyptic number.

2218181983 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218181983 is an equidigital number, since it uses as much as digits as its factorization.

2218181983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 43.

The square root of 2218181983 is about 47097.5793751653. The cubic root of 2218181983 is about 1304.1645505317.

The spelling of 2218181983 in words is "two billion, two hundred eighteen million, one hundred eighty-one thousand, nine hundred eighty-three".