2218901 has 2 divisors, whose sum is σ = 2218902. Its totient is φ = 2218900.

The previous prime is 2218897. The next prime is 2218903. The reversal of 2218901 is 1098122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2172676 + 46225 = 1474^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218901 - 2² = 2218897 is a prime.

Together with 2218903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109450 + 1109451.

It is an arithmetic number, because the mean of its divisors is an integer number (1109451).

2^2218901 is an apocalyptic number.

It is an amenable number.

2218901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218901 is an equidigital number, since it uses as much as digits as its factorization.

2218901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2218901 is about 1489.5975966683. The cubic root of 2218901 is about 130.4305448977.

The spelling of 2218901 in words is "two million, two hundred eighteen thousand, nine hundred one".