56640271 has 2 divisors, whose sum is σ = 56640272. Its totient is φ = 56640270.

The previous prime is 56640247. The next prime is 56640281. The reversal of 56640271 is 17204665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56640271 - 2¹¹ = 56638223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56640281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320135 + 28320136.

It is an arithmetic number, because the mean of its divisors is an integer number (28320136).

Almost surely, 2^56640271 is an apocalyptic number.

56640271 is a deficient number, since it is larger than the sum of its proper divisors (1).

56640271 is an equidigital number, since it uses as much as digits as its factorization.

56640271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 56640271 is about 7525.9730932285. The cubic root of 56640271 is about 384.0388031354.

The spelling of 56640271 in words is "fifty-six million, six hundred forty thousand, two hundred seventy-one".