2158214979 has 8 divisors (see below), whose sum is σ = 2882182912. Its totient is φ = 1436528520.

The previous prime is 2158214909. The next prime is 2158214999. The reversal of 2158214979 is 9794128512.

It is a happy number.

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

It is not a de Polignac number, because 2158214979 - 2²⁷ = 2023997251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2158214909) 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, 568159 + ... + 571944.

It is an arithmetic number, because the mean of its divisors is an integer number (360272864).

Almost surely, 2^2158214979 is an apocalyptic number.

2158214979 is a deficient number, since it is larger than the sum of its proper divisors (723967933).

2158214979 is a wasteful number, since it uses less digits than its factorization.

2158214979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140737.

The product of its digits is 362880, while the sum is 48.

The square root of 2158214979 is about 46456.5924170079. The cubic root of 2158214979 is about 1292.3046315177.

The spelling of 2158214979 in words is "two billion, one hundred fifty-eight million, two hundred fourteen thousand, nine hundred seventy-nine".