2218375693 has 2 divisors, whose sum is σ = 2218375694. Its totient is φ = 2218375692.

The previous prime is 2218375673. The next prime is 2218375697. The reversal of 2218375693 is 3965738122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763748009 + 454627684 = 41997^2 + 21322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218375693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218375697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109187846 + 1109187847.

It is an arithmetic number, because the mean of its divisors is an integer number (1109187847).

Almost surely, 2^2218375693 is an apocalyptic number.

It is an amenable number.

2218375693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218375693 is an equidigital number, since it uses as much as digits as its factorization.

2218375693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 2218375693 is about 47099.6358053860. The cubic root of 2218375693 is about 1304.2025129056.

The spelling of 2218375693 in words is "two billion, two hundred eighteen million, three hundred seventy-five thousand, six hundred ninety-three".