2163851 has 2 divisors, whose sum is σ = 2163852. Its totient is φ = 2163850.

The previous prime is 2163829. The next prime is 2163859. The reversal of 2163851 is 1583612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2163851 - 2⁶ = 2163787 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2163851.

It is not a weakly prime, because it can be changed into another prime (2163859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081925 + 1081926.

It is an arithmetic number, because the mean of its divisors is an integer number (1081926).

2^2163851 is an apocalyptic number.

2163851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163851 is an equidigital number, since it uses as much as digits as its factorization.

2163851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 2163851 is about 1471.0033990443. The cubic root of 2163851 is about 129.3428573483.

The spelling of 2163851 in words is "two million, one hundred sixty-three thousand, eight hundred fifty-one".