56640523 has 2 divisors, whose sum is σ = 56640524. Its totient is φ = 56640522.

The previous prime is 56640491. The next prime is 56640533. The reversal of 56640523 is 32504665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56640523 - 2⁵ = 56640491 is a prime.

It is not a weakly prime, because it can be changed into another prime (56640533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320261 + 28320262.

It is an arithmetic number, because the mean of its divisors is an integer number (28320262).

Almost surely, 2^56640523 is an apocalyptic number.

56640523 is a deficient number, since it is larger than the sum of its proper divisors (1).

56640523 is an equidigital number, since it uses as much as digits as its factorization.

56640523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 56640523 is about 7525.9898352310. The cubic root of 56640523 is about 384.0393726809.

The spelling of 56640523 in words is "fifty-six million, six hundred forty thousand, five hundred twenty-three".