2221428279 has 24 divisors (see below), whose sum is σ = 3449051760. Its totient is φ = 1268072064.

The previous prime is 2221428259. The next prime is 2221428317. The reversal of 2221428279 is 9728241222.

It is not a de Polignac number, because 2221428279 - 2⁷ = 2221428151 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221428229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144537 + ... + 159165.

It is an arithmetic number, because the mean of its divisors is an integer number (143710490).

Almost surely, 2^2221428279 is an apocalyptic number.

2221428279 is a deficient number, since it is larger than the sum of its proper divisors (1227623481).

2221428279 is a wasteful number, since it uses less digits than its factorization.

2221428279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15679 (or 15672 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 2221428279 is about 47132.0302872686. The cubic root of 2221428279 is about 1304.8004527466.

The spelling of 2221428279 in words is "two billion, two hundred twenty-one million, four hundred twenty-eight thousand, two hundred seventy-nine".