2418779221 has 2 divisors, whose sum is σ = 2418779222. Its totient is φ = 2418779220.

The previous prime is 2418779219. The next prime is 2418779273. The reversal of 2418779221 is 1229778142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304220996 + 1114558225 = 36114^2 + 33385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2418779221 - 2¹ = 2418779219 is a prime.

Together with 2418779219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2418779821) 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 as a sum of consecutive naturals, namely, 1209389610 + 1209389611.

It is an arithmetic number, because the mean of its divisors is an integer number (1209389611).

Almost surely, 2^2418779221 is an apocalyptic number.

It is an amenable number.

2418779221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2418779221 is an equidigital number, since it uses as much as digits as its factorization.

2418779221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 43.

The square root of 2418779221 is about 49181.0860087493. The cubic root of 2418779221 is about 1342.3488951623.

The spelling of 2418779221 in words is "two billion, four hundred eighteen million, seven hundred seventy-nine thousand, two hundred twenty-one".