56581303 has 2 divisors, whose sum is σ = 56581304. Its totient is φ = 56581302.

The previous prime is 56581243. The next prime is 56581309. The reversal of 56581303 is 30318565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56581303 - 2¹⁷ = 56450231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56581309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28290651 + 28290652.

It is an arithmetic number, because the mean of its divisors is an integer number (28290652).

Almost surely, 2^56581303 is an apocalyptic number.

56581303 is a deficient number, since it is larger than the sum of its proper divisors (1).

56581303 is an equidigital number, since it uses as much as digits as its factorization.

56581303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 56581303 is about 7522.0544401114. The cubic root of 56581303 is about 383.9054830130.

Adding to 56581303 its reverse (30318565), we get a palindrome (86899868).

The spelling of 56581303 in words is "fifty-six million, five hundred eighty-one thousand, three hundred three".