279113221 has 8 divisors (see below), whose sum is σ = 281635200. Its totient is φ = 276602832.

The previous prime is 279113203. The next prime is 279113231. The reversal of 279113221 is 122311972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 279113221 - 2⁹ = 279112709 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 279113221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279113201) 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, 49671 + ... + 55003.

It is an arithmetic number, because the mean of its divisors is an integer number (35204400).

Almost surely, 2^279113221 is an apocalyptic number.

It is an amenable number.

279113221 is a deficient number, since it is larger than the sum of its proper divisors (2521979).

279113221 is a wasteful number, since it uses less digits than its factorization.

279113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795.

The product of its digits is 1512, while the sum is 28.

The square root of 279113221 is about 16706.6819267023. The cubic root of 279113221 is about 653.5218857133.

The spelling of 279113221 in words is "two hundred seventy-nine million, one hundred thirteen thousand, two hundred twenty-one".