56551903 has 2 divisors, whose sum is σ = 56551904. Its totient is φ = 56551902.

The previous prime is 56551897. The next prime is 56551909. The reversal of 56551903 is 30915565.

It is a balanced prime because it is at equal distance from previous prime (56551897) and next prime (56551909).

It is a cyclic number.

It is not a de Polignac number, because 56551903 - 2¹⁷ = 56420831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56551909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28275951 + 28275952.

It is an arithmetic number, because the mean of its divisors is an integer number (28275952).

Almost surely, 2^56551903 is an apocalyptic number.

56551903 is a deficient number, since it is larger than the sum of its proper divisors (1).

56551903 is an equidigital number, since it uses as much as digits as its factorization.

56551903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 56551903 is about 7520.0999328466. The cubic root of 56551903 is about 383.8389782604.

The spelling of 56551903 in words is "fifty-six million, five hundred fifty-one thousand, nine hundred three".