2218937 has 4 divisors (see below), whose sum is σ = 2535936. Its totient is φ = 1901940.

The previous prime is 2218933. The next prime is 2218943. The reversal of 2218937 is 7398122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2218937 - 2² = 2218933 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218933) 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 in 3 ways as a sum of consecutive naturals, for example, 158489 + ... + 158502.

It is an arithmetic number, because the mean of its divisors is an integer number (633984).

2^2218937 is an apocalyptic number.

It is an amenable number.

2218937 is a deficient number, since it is larger than the sum of its proper divisors (316999).

2218937 is an equidigital number, since it uses as much as digits as its factorization.

2218937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316998.

The product of its digits is 6048, while the sum is 32.

The square root of 2218937 is about 1489.6096804197. The cubic root of 2218937 is about 130.4312502731.

It can be divided in two parts, 22 and 18937, that multiplied together give a palindrome (416614).

The spelling of 2218937 in words is "two million, two hundred eighteen thousand, nine hundred thirty-seven".