545253521 has 2 divisors, whose sum is σ = 545253522. Its totient is φ = 545253520.

The previous prime is 545253491. The next prime is 545253539. The reversal of 545253521 is 125352545.

545253521 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., 470673025 + 74580496 = 21695^2 + 8636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545253521 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (545253551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272626760 + 272626761.

It is an arithmetic number, because the mean of its divisors is an integer number (272626761).

Almost surely, 2^545253521 is an apocalyptic number.

It is an amenable number.

545253521 is a deficient number, since it is larger than the sum of its proper divisors (1).

545253521 is an equidigital number, since it uses as much as digits as its factorization.

545253521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 32.

The square root of 545253521 is about 23350.6642517938. The cubic root of 545253521 is about 816.9575541491.

The spelling of 545253521 in words is "five hundred forty-five million, two hundred fifty-three thousand, five hundred twenty-one".