2168651 has 2 divisors, whose sum is σ = 2168652. Its totient is φ = 2168650.

The previous prime is 2168623. The next prime is 2168653. The reversal of 2168651 is 1568612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2168651 - 2⁶ = 2168587 is a prime.

Together with 2168653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2168653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084325 + 1084326.

It is an arithmetic number, because the mean of its divisors is an integer number (1084326).

2^2168651 is an apocalyptic number.

2168651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168651 is an equidigital number, since it uses as much as digits as its factorization.

2168651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 2168651 is about 1472.6340346468. The cubic root of 2168651 is about 129.4384257297.

The spelling of 2168651 in words is "two million, one hundred sixty-eight thousand, six hundred fifty-one".