545022521 has 2 divisors, whose sum is σ = 545022522. Its totient is φ = 545022520.

The previous prime is 545022509. The next prime is 545022523. The reversal of 545022521 is 125220545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544708921 + 313600 = 23339^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 545022521 - 2¹⁰ = 545021497 is a prime.

Together with 545022523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545022523) 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, 272511260 + 272511261.

It is an arithmetic number, because the mean of its divisors is an integer number (272511261).

Almost surely, 2^545022521 is an apocalyptic number.

It is an amenable number.

545022521 is a deficient number, since it is larger than the sum of its proper divisors (1).

545022521 is an equidigital number, since it uses as much as digits as its factorization.

545022521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 545022521 is about 23345.7174016992. The cubic root of 545022521 is about 816.8421681592.

The spelling of 545022521 in words is "five hundred forty-five million, twenty-two thousand, five hundred twenty-one".