2218948387 has 2 divisors, whose sum is σ = 2218948388. Its totient is φ = 2218948386.

The previous prime is 2218948367. The next prime is 2218948397. The reversal of 2218948387 is 7838498122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218948387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2218948327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109474193 + 1109474194.

It is an arithmetic number, because the mean of its divisors is an integer number (1109474194).

Almost surely, 2^2218948387 is an apocalyptic number.

2218948387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218948387 is an equidigital number, since it uses as much as digits as its factorization.

2218948387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 52.

The square root of 2218948387 is about 47105.7150142103. The cubic root of 2218948387 is about 1304.3147338566.

The spelling of 2218948387 in words is "two billion, two hundred eighteen million, nine hundred forty-eight thousand, three hundred eighty-seven".