2051311 has 2 divisors, whose sum is σ = 2051312. Its totient is φ = 2051310.

The previous prime is 2051281. The next prime is 2051321. The reversal of 2051311 is 1131502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2051311 - 2⁵ = 2051279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2051291 and 2051300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025655 + 1025656.

It is an arithmetic number, because the mean of its divisors is an integer number (1025656).

2^2051311 is an apocalyptic number.

2051311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051311 is an equidigital number, since it uses as much as digits as its factorization.

2051311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 2051311 is about 1432.2398542144. The cubic root of 2051311 is about 127.0604833115.

Adding to 2051311 its reverse (1131502), we get a palindrome (3182813).

The spelling of 2051311 in words is "two million, fifty-one thousand, three hundred eleven".