2051191 has 2 divisors, whose sum is σ = 2051192. Its totient is φ = 2051190.

The previous prime is 2051173. The next prime is 2051219. The reversal of 2051191 is 1911502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2051191 - 2⁹ = 2050679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025595 + 1025596.

It is an arithmetic number, because the mean of its divisors is an integer number (1025596).

2^2051191 is an apocalyptic number.

2051191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051191 is an equidigital number, since it uses as much as digits as its factorization.

2051191 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 2051191 is about 1432.1979611772. The cubic root of 2051191 is about 127.0580056187.

Adding to 2051191 its reverse (1911502), we get a palindrome (3962693).

It can be divided in two parts, 205119 and 1, that added together give a triangular number (205120 = T₆₄₀).

The spelling of 2051191 in words is "two million, fifty-one thousand, one hundred ninety-one".