2279239221 has 32 divisors (see below), whose sum is σ = 3658992640. Its totient is φ = 1232838144.

The previous prime is 2279239219. The next prime is 2279239229. The reversal of 2279239221 is 1229329722.

It is not a de Polignac number, because 2279239221 - 2¹ = 2279239219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2279239221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2279239229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 877701 + ... + 880293.

It is an arithmetic number, because the mean of its divisors is an integer number (114343520).

Almost surely, 2^2279239221 is an apocalyptic number.

2279239221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2279239221 is a deficient number, since it is larger than the sum of its proper divisors (1379753419).

2279239221 is a wasteful number, since it uses less digits than its factorization.

2279239221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825.

The product of its digits is 54432, while the sum is 39.

The square root of 2279239221 is about 47741.3784991594. The cubic root of 2279239221 is about 1316.0224658800.

The spelling of 2279239221 in words is "two billion, two hundred seventy-nine million, two hundred thirty-nine thousand, two hundred twenty-one".