2158931194 has 16 divisors (see below), whose sum is σ = 3702041856. Its totient is φ = 925002000.

The previous prime is 2158931161. The next prime is 2158931207. The reversal of 2158931194 is 4911398512.

2158931194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2158931194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37119 + ... + 75469.

It is an arithmetic number, because the mean of its divisors is an integer number (231377616).

Almost surely, 2^2158931194 is an apocalyptic number.

2158931194 is a deficient number, since it is larger than the sum of its proper divisors (1543110662).

2158931194 is a wasteful number, since it uses less digits than its factorization.

2158931194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42381.

The product of its digits is 77760, while the sum is 43.

The square root of 2158931194 is about 46464.3002099461. The cubic root of 2158931194 is about 1292.4475684054.

The spelling of 2158931194 in words is "two billion, one hundred fifty-eight million, nine hundred thirty-one thousand, one hundred ninety-four".