2091151 has 2 divisors, whose sum is σ = 2091152. Its totient is φ = 2091150.

The previous prime is 2091149. The next prime is 2091191. The reversal of 2091151 is 1511902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2091151 - 2¹ = 2091149 is a prime.

Together with 2091149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045575 + 1045576.

It is an arithmetic number, because the mean of its divisors is an integer number (1045576).

2^2091151 is an apocalyptic number.

2091151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091151 is an equidigital number, since it uses as much as digits as its factorization.

2091151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 2091151 is about 1446.0812563615. The cubic root of 2091151 is about 127.8777927028.

The spelling of 2091151 in words is "two million, ninety-one thousand, one hundred fifty-one".