2879920221 has 16 divisors (see below), whose sum is σ = 3872985600. Its totient is φ = 1903471920.

The previous prime is 2879920189. The next prime is 2879920223. The reversal of 2879920221 is 1220299782.

It is not a de Polignac number, because 2879920221 - 2⁵ = 2879920189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2879920223) 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, 157830 + ... + 175128.

It is an arithmetic number, because the mean of its divisors is an integer number (242061600).

Almost surely, 2^2879920221 is an apocalyptic number.

It is an amenable number.

2879920221 is a deficient number, since it is larger than the sum of its proper divisors (993065379).

2879920221 is a wasteful number, since it uses less digits than its factorization.

2879920221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17776.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 2879920221 is about 53664.8881579008. Note that the first 3 decimals coincide. The cubic root of 2879920221 is about 1422.7441843881.

The spelling of 2879920221 in words is "two billion, eight hundred seventy-nine million, nine hundred twenty thousand, two hundred twenty-one".