656281271 has 2 divisors, whose sum is σ = 656281272. Its totient is φ = 656281270.

The previous prime is 656281229. The next prime is 656281303. The reversal of 656281271 is 172182656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656281271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656281201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328140635 + 328140636.

It is an arithmetic number, because the mean of its divisors is an integer number (328140636).

Almost surely, 2^656281271 is an apocalyptic number.

656281271 is a deficient number, since it is larger than the sum of its proper divisors (1).

656281271 is an equidigital number, since it uses as much as digits as its factorization.

656281271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 656281271 is about 25617.9872550519. The cubic root of 656281271 is about 869.0204640283.

The spelling of 656281271 in words is "six hundred fifty-six million, two hundred eighty-one thousand, two hundred seventy-one".