2141993591 has 4 divisors (see below), whose sum is σ = 2267993232. Its totient is φ = 2015993952.

The previous prime is 2141993587. The next prime is 2141993599. The reversal of 2141993591 is 1953991412.

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 2141993591 - 2² = 2141993587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141993599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62999795 + ... + 62999828.

It is an arithmetic number, because the mean of its divisors is an integer number (566998308).

Almost surely, 2^2141993591 is an apocalyptic number.

2141993591 is a deficient number, since it is larger than the sum of its proper divisors (125999641).

2141993591 is a wasteful number, since it uses less digits than its factorization.

2141993591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125999640.

The product of its digits is 87480, while the sum is 44.

The square root of 2141993591 is about 46281.6766226117. The cubic root of 2141993591 is about 1289.0587832148.

The spelling of 2141993591 in words is "two billion, one hundred forty-one million, nine hundred ninety-three thousand, five hundred ninety-one".