2218837 has 2 divisors, whose sum is σ = 2218838. Its totient is φ = 2218836.

The previous prime is 2218831. The next prime is 2218861. The reversal of 2218837 is 7388122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1962801 + 256036 = 1401^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218837 - 2⁷ = 2218709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2218799 and 2218808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109418 + 1109419.

It is an arithmetic number, because the mean of its divisors is an integer number (1109419).

2^2218837 is an apocalyptic number.

It is an amenable number.

2218837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218837 is an equidigital number, since it uses as much as digits as its factorization.

2218837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 2218837 is about 1489.5761142016. The cubic root of 2218837 is about 130.4292908783.

It can be divided in two parts, 22 and 18837, that multiplied together give a palindrome (414414).

The spelling of 2218837 in words is "two million, two hundred eighteen thousand, eight hundred thirty-seven".