2218751 has 2 divisors, whose sum is σ = 2218752. Its totient is φ = 2218750.

The previous prime is 2218709. The next prime is 2218771. The reversal of 2218751 is 1578122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218751 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2218751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109375 + 1109376.

It is an arithmetic number, because the mean of its divisors is an integer number (1109376).

2^2218751 is an apocalyptic number.

2218751 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218751 is an equidigital number, since it uses as much as digits as its factorization.

2218751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 2218751 is about 1489.5472466491. The cubic root of 2218751 is about 130.4276057517.

The spelling of 2218751 in words is "two million, two hundred eighteen thousand, seven hundred fifty-one".