2228657 has 2 divisors, whose sum is σ = 2228658. Its totient is φ = 2228656.

The previous prime is 2228591. The next prime is 2228659. The reversal of 2228657 is 7568222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1948816 + 279841 = 1396^2 + 529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2228657 is a prime.

Together with 2228659, 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 (2228659) 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, 1114328 + 1114329.

It is an arithmetic number, because the mean of its divisors is an integer number (1114329).

2^2228657 is an apocalyptic number.

It is an amenable number.

2228657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2228657 is an equidigital number, since it uses as much as digits as its factorization.

2228657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 2228657 is about 1492.8687149244. The cubic root of 2228657 is about 130.6214231753.

The spelling of 2228657 in words is "two million, two hundred twenty-eight thousand, six hundred fifty-seven".