2051361 has 24 divisors (see below), whose sum is σ = 3243240. Its totient is φ = 1241856.

The previous prime is 2051359. The next prime is 2051383. The reversal of 2051361 is 1631502.

It can be written as a sum of positive squares in 4 ways, for example, as 245025 + 1806336 = 495^2 + 1344^2 .

It is not a de Polignac number, because 2051361 - 2¹ = 2051359 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051311) 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 23 ways as a sum of consecutive naturals, for example, 10315 + ... + 10511.

It is an arithmetic number, because the mean of its divisors is an integer number (135135).

2^2051361 is an apocalyptic number.

It is an amenable number.

2051361 is a deficient number, since it is larger than the sum of its proper divisors (1191879).

2051361 is a wasteful number, since it uses less digits than its factorization.

2051361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2051361 is about 1432.2573092849. The cubic root of 2051361 is about 127.0615156550.

Adding to 2051361 its reverse (1631502), we get a palindrome (3682863).

The spelling of 2051361 in words is "two million, fifty-one thousand, three hundred sixty-one".