2221786605 has 16 divisors (see below), whose sum is σ = 3561186240. Its totient is φ = 1182843648.

The previous prime is 2221786573. The next prime is 2221786607. The reversal of 2221786605 is 5066871222.

It is not a de Polignac number, because 2221786605 - 2⁵ = 2221786573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221786607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123100 + ... + 139989.

It is an arithmetic number, because the mean of its divisors is an integer number (222574140).

Almost surely, 2^2221786605 is an apocalyptic number.

It is an amenable number.

2221786605 is a deficient number, since it is larger than the sum of its proper divisors (1339399635).

2221786605 is a wasteful number, since it uses less digits than its factorization.

2221786605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263660.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 2221786605 is about 47135.8314342709. The cubic root of 2221786605 is about 1304.8706056289.

The spelling of 2221786605 in words is "two billion, two hundred twenty-one million, seven hundred eighty-six thousand, six hundred five".