2221485779 has 2 divisors, whose sum is σ = 2221485780. Its totient is φ = 2221485778.

The previous prime is 2221485733. The next prime is 2221485781. The reversal of 2221485779 is 9775841222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221485779 - 2¹² = 2221481683 is a prime.

Together with 2221485781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2221485379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110742889 + 1110742890.

It is an arithmetic number, because the mean of its divisors is an integer number (1110742890).

Almost surely, 2^2221485779 is an apocalyptic number.

2221485779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221485779 is an equidigital number, since it uses as much as digits as its factorization.

2221485779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 2221485779 is about 47132.6402718965. The cubic root of 2221485779 is about 1304.8117105755.

The spelling of 2221485779 in words is "two billion, two hundred twenty-one million, four hundred eighty-five thousand, seven hundred seventy-nine".