2221423663 has 4 divisors (see below), whose sum is σ = 2221670088. Its totient is φ = 2221177240.

The previous prime is 2221423619. The next prime is 2221423669. The reversal of 2221423663 is 3663241222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221423663 - 2⁹ = 2221423151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221423669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109156 + ... + 127897.

It is an arithmetic number, because the mean of its divisors is an integer number (555417522).

Almost surely, 2^2221423663 is an apocalyptic number.

2221423663 is a deficient number, since it is larger than the sum of its proper divisors (246425).

2221423663 is an equidigital number, since it uses as much as digits as its factorization.

2221423663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246424.

The product of its digits is 20736, while the sum is 31.

The square root of 2221423663 is about 47131.9813184211. The cubic root of 2221423663 is about 1304.7995489792.

Adding to 2221423663 its reverse (3663241222), we get a palindrome (5884664885).

The spelling of 2221423663 in words is "two billion, two hundred twenty-one million, four hundred twenty-three thousand, six hundred sixty-three".