2161157106 has 8 divisors (see below), whose sum is σ = 4322314224. Its totient is φ = 720385700.

The previous prime is 2161157083. The next prime is 2161157123. The reversal of 2161157106 is 6017511612.

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

2161157106 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180096420 + ... + 180096431.

It is an arithmetic number, because the mean of its divisors is an integer number (540289278).

Almost surely, 2^2161157106 is an apocalyptic number.

2161157106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161157106 is a wasteful number, since it uses less digits than its factorization.

2161157106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360192856.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 2161157106 is about 46488.2469663032. The cubic root of 2161157106 is about 1292.8915977497.

Adding to 2161157106 its reverse (6017511612), we get a palindrome (8178668718).

The spelling of 2161157106 in words is "two billion, one hundred sixty-one million, one hundred fifty-seven thousand, one hundred six".