2191304139 has 8 divisors (see below), whose sum is σ = 3048771072. Its totient is φ = 1397353320.

The previous prime is 2191304117. The next prime is 2191304147. The reversal of 2191304139 is 9314031912.

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 2191304139 - 2⁸ = 2191303883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2191304149) 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, 15878947 + ... + 15879084.

It is an arithmetic number, because the mean of its divisors is an integer number (381096384).

Almost surely, 2^2191304139 is an apocalyptic number.

2191304139 is a deficient number, since it is larger than the sum of its proper divisors (857466933).

2191304139 is a wasteful number, since it uses less digits than its factorization.

2191304139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31758057.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2191304139 is about 46811.3676258235. The cubic root of 2191304139 is about 1298.8755837486.

The spelling of 2191304139 in words is "two billion, one hundred ninety-one million, three hundred four thousand, one hundred thirty-nine".