2251643 has 2 divisors, whose sum is σ = 2251644. Its totient is φ = 2251642.

The previous prime is 2251637. The next prime is 2251649. The reversal of 2251643 is 3461522.

It is a balanced prime because it is at equal distance from previous prime (2251637) and next prime (2251649).

It is a cyclic number.

It is not a de Polignac number, because 2251643 - 2¹⁸ = 1989499 is a prime.

It is a d-powerful number, because it can be written as 2 + 2³ + 5⁹ + 1 + 6⁷ + 4⁷ + 3⁷ .

It is not a weakly prime, because it can be changed into another prime (2251649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125821 + 1125822.

It is an arithmetic number, because the mean of its divisors is an integer number (1125822).

2^2251643 is an apocalyptic number.

2251643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251643 is an equidigital number, since it uses as much as digits as its factorization.

2251643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 2251643 is about 1500.5475667236. The cubic root of 2251643 is about 131.0689573434.

The spelling of 2251643 in words is "two million, two hundred fifty-one thousand, six hundred forty-three".