2163251 has 2 divisors, whose sum is σ = 2163252. Its totient is φ = 2163250.

The previous prime is 2163247. The next prime is 2163263. The reversal of 2163251 is 1523612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2163251 - 2² = 2163247 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2163221) 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, 1081625 + 1081626.

It is an arithmetic number, because the mean of its divisors is an integer number (1081626).

2^2163251 is an apocalyptic number.

2163251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163251 is an equidigital number, since it uses as much as digits as its factorization.

2163251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 2163251 is about 1470.7994424802. The cubic root of 2163251 is about 129.3309013666.

Adding to 2163251 its reverse (1523612), we get a palindrome (3686863).

The spelling of 2163251 in words is "two million, one hundred sixty-three thousand, two hundred fifty-one".