2221954663 has 2 divisors, whose sum is σ = 2221954664. Its totient is φ = 2221954662.

The previous prime is 2221954649. The next prime is 2221954703. The reversal of 2221954663 is 3664591222.

It is an a-pointer prime, because the next prime (2221954703) can be obtained adding 2221954663 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221954663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221954613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110977331 + 1110977332.

It is an arithmetic number, because the mean of its divisors is an integer number (1110977332).

Almost surely, 2^2221954663 is an apocalyptic number.

2221954663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221954663 is an equidigital number, since it uses as much as digits as its factorization.

2221954663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 2221954663 is about 47137.6140995702. The cubic root of 2221954663 is about 1304.9035053405.

The spelling of 2221954663 in words is "two billion, two hundred twenty-one million, nine hundred fifty-four thousand, six hundred sixty-three".