56354821 has 2 divisors, whose sum is σ = 56354822. Its totient is φ = 56354820.

The previous prime is 56354803. The next prime is 56354849. The reversal of 56354821 is 12845365.

56354821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50253921 + 6100900 = 7089^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 56354821 - 2¹³ = 56346629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56354521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28177410 + 28177411.

It is an arithmetic number, because the mean of its divisors is an integer number (28177411).

Almost surely, 2^56354821 is an apocalyptic number.

It is an amenable number.

56354821 is a deficient number, since it is larger than the sum of its proper divisors (1).

56354821 is an equidigital number, since it uses as much as digits as its factorization.

56354821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 56354821 is about 7506.9848141581. The cubic root of 56354821 is about 383.3925694638.

It can be divided in two parts, 56354 and 821, that added together give a palindrome (57175).

The spelling of 56354821 in words is "fifty-six million, three hundred fifty-four thousand, eight hundred twenty-one".