2221065438 has 16 divisors (see below), whose sum is σ = 4476041856. Its totient is φ = 734703320.

The previous prime is 2221065433. The next prime is 2221065461. The reversal of 2221065438 is 8345601222.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2221065399 and 2221065408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221065433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1412106 + ... + 1413677.

It is an arithmetic number, because the mean of its divisors is an integer number (279752616).

Almost surely, 2^2221065438 is an apocalyptic number.

2221065438 is an abundant number, since it is smaller than the sum of its proper divisors (2254976418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221065438 is a wasteful number, since it uses less digits than its factorization.

2221065438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825919.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 2221065438 is about 47128.1809324315. The cubic root of 2221065438 is about 1304.7294082322.

The spelling of 2221065438 in words is "two billion, two hundred twenty-one million, sixty-five thousand, four hundred thirty-eight".