545330521 has 2 divisors, whose sum is σ = 545330522. Its totient is φ = 545330520.

The previous prime is 545330497. The next prime is 545330557. The reversal of 545330521 is 125033545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513520921 + 31809600 = 22661^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 545330521 - 2¹⁹ = 544806233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545330521.

It is not a weakly prime, because it can be changed into another prime (545330581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272665260 + 272665261.

It is an arithmetic number, because the mean of its divisors is an integer number (272665261).

Almost surely, 2^545330521 is an apocalyptic number.

It is an amenable number.

545330521 is a deficient number, since it is larger than the sum of its proper divisors (1).

545330521 is an equidigital number, since it uses as much as digits as its factorization.

545330521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 545330521 is about 23352.3129689545. The cubic root of 545330521 is about 816.9960089035.

The spelling of 545330521 in words is "five hundred forty-five million, three hundred thirty thousand, five hundred twenty-one".