2218901749 has 2 divisors, whose sum is σ = 2218901750. Its totient is φ = 2218901748.

The previous prime is 2218901717. The next prime is 2218901753. The reversal of 2218901749 is 9471098122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1557486225 + 661415524 = 39465^2 + 25718^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218901749 - 2⁵ = 2218901717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218901549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109450874 + 1109450875.

It is an arithmetic number, because the mean of its divisors is an integer number (1109450875).

Almost surely, 2^2218901749 is an apocalyptic number.

It is an amenable number.

2218901749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218901749 is an equidigital number, since it uses as much as digits as its factorization.

2218901749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 2218901749 is about 47105.2199761343. The cubic root of 2218901749 is about 1304.3055957355.

The spelling of 2218901749 in words is "two billion, two hundred eighteen million, nine hundred one thousand, seven hundred forty-nine".