2221219823 has 16 divisors (see below), whose sum is σ = 2332749120. Its totient is φ = 2112251904.

The previous prime is 2221219817. The next prime is 2221219831. The reversal of 2221219823 is 3289121222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2221219823 - 2¹² = 2221215727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221219823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221219123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574565 + ... + 578417.

It is an arithmetic number, because the mean of its divisors is an integer number (145796820).

Almost surely, 2^2221219823 is an apocalyptic number.

2221219823 is a deficient number, since it is larger than the sum of its proper divisors (111529297).

2221219823 is a wasteful number, since it uses less digits than its factorization.

2221219823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4178.

The product of its digits is 6912, while the sum is 32.

The square root of 2221219823 is about 47129.8188305451. The cubic root of 2221219823 is about 1304.7596378657.

The spelling of 2221219823 in words is "two billion, two hundred twenty-one million, two hundred nineteen thousand, eight hundred twenty-three".