55304521 has 2 divisors, whose sum is σ = 55304522. Its totient is φ = 55304520.

The previous prime is 55304461. The next prime is 55304533. The reversal of 55304521 is 12540355.

55304521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49154121 + 6150400 = 7011^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 55304521 - 2⁷ = 55304393 is a prime.

It is not a weakly prime, because it can be changed into another prime (55304591) 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, 27652260 + 27652261.

It is an arithmetic number, because the mean of its divisors is an integer number (27652261).

Almost surely, 2^55304521 is an apocalyptic number.

It is an amenable number.

55304521 is a deficient number, since it is larger than the sum of its proper divisors (1).

55304521 is an equidigital number, since it uses as much as digits as its factorization.

55304521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55304521 is about 7436.7009486734. The cubic root of 55304521 is about 380.9958206865.

Adding to 55304521 its reverse (12540355), we get a palindrome (67844876).

The spelling of 55304521 in words is "fifty-five million, three hundred four thousand, five hundred twenty-one".