2218451 has 2 divisors, whose sum is σ = 2218452. Its totient is φ = 2218450.

The previous prime is 2218439. The next prime is 2218519. The reversal of 2218451 is 1548122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218451 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2218351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109225 + 1109226.

It is an arithmetic number, because the mean of its divisors is an integer number (1109226).

2^2218451 is an apocalyptic number.

2218451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218451 is an equidigital number, since it uses as much as digits as its factorization.

2218451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 23.

The square root of 2218451 is about 1489.4465415046. The cubic root of 2218451 is about 130.4217270620.

The spelling of 2218451 in words is "two million, two hundred eighteen thousand, four hundred fifty-one".