2127159491 has 4 divisors (see below), whose sum is σ = 2128788312. Its totient is φ = 2125530672.

The previous prime is 2127159481. The next prime is 2127159533. The reversal of 2127159491 is 1949517212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2127159491 - 2⁶ = 2127159427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2127159401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812450 + ... + 815063.

It is an arithmetic number, because the mean of its divisors is an integer number (532197078).

Almost surely, 2^2127159491 is an apocalyptic number.

2127159491 is a deficient number, since it is larger than the sum of its proper divisors (1628821).

2127159491 is a wasteful number, since it uses less digits than its factorization.

2127159491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628820.

The product of its digits is 45360, while the sum is 41.

The square root of 2127159491 is about 46121.1393072634. The cubic root of 2127159491 is about 1286.0761505908.

The spelling of 2127159491 in words is "two billion, one hundred twenty-seven million, one hundred fifty-nine thousand, four hundred ninety-one".