2152091 has 4 divisors (see below), whose sum is σ = 2172312. Its totient is φ = 2131872.

The previous prime is 2152079. The next prime is 2152093. The reversal of 2152091 is 1902512.

2152091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9950 + ... + 10163.

It is an arithmetic number, because the mean of its divisors is an integer number (543078).

2^2152091 is an apocalyptic number.

2152091 is a deficient number, since it is larger than the sum of its proper divisors (20221).

2152091 is a wasteful number, since it uses less digits than its factorization.

2152091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20220.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2152091 is about 1467.0006816631. Note that the first 3 decimals coincide. The cubic root of 2152091 is about 129.1081160000.

The spelling of 2152091 in words is "two million, one hundred fifty-two thousand, ninety-one".