2218613 has 2 divisors, whose sum is σ = 2218614. Its totient is φ = 2218612.

The previous prime is 2218609. The next prime is 2218621. The reversal of 2218613 is 3168122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 253009 = 1402^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218613 - 2² = 2218609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109306 + 1109307.

It is an arithmetic number, because the mean of its divisors is an integer number (1109307).

2^2218613 is an apocalyptic number.

It is an amenable number.

2218613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218613 is an equidigital number, since it uses as much as digits as its factorization.

2218613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 2218613 is about 1489.5009231283. The cubic root of 2218613 is about 130.4249016203.

The spelling of 2218613 in words is "two million, two hundred eighteen thousand, six hundred thirteen".