56354521 has 2 divisors, whose sum is σ = 56354522. Its totient is φ = 56354520.

The previous prime is 56354491. The next prime is 56354549. The reversal of 56354521 is 12545365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 11128896 = 6725^2 + 3336^2 .

It is a cyclic number.

It is not a de Polignac number, because 56354521 - 2¹⁷ = 56223449 is a prime.

It is not a weakly prime, because it can be changed into another prime (56354561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28177260 + 28177261.

It is an arithmetic number, because the mean of its divisors is an integer number (28177261).

Almost surely, 2^56354521 is an apocalyptic number.

It is an amenable number.

56354521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56354521 is an equidigital number, since it uses as much as digits as its factorization.

56354521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 56354521 is about 7506.9648327403. The cubic root of 56354521 is about 383.3918891435.

Adding to 56354521 its reverse (12545365), we get a palindrome (68899886).

The spelling of 56354521 in words is "fifty-six million, three hundred fifty-four thousand, five hundred twenty-one".