545220461 has 2 divisors, whose sum is σ = 545220462. Its totient is φ = 545220460.

The previous prime is 545220457. The next prime is 545220491. The reversal of 545220461 is 164022545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431392900 + 113827561 = 20770^2 + 10669^2 .

It is a cyclic number.

It is not a de Polignac number, because 545220461 - 2² = 545220457 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545220491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272610230 + 272610231.

It is an arithmetic number, because the mean of its divisors is an integer number (272610231).

Almost surely, 2^545220461 is an apocalyptic number.

It is an amenable number.

545220461 is a deficient number, since it is larger than the sum of its proper divisors (1).

545220461 is an equidigital number, since it uses as much as digits as its factorization.

545220461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 545220461 is about 23349.9563382889. The cubic root of 545220461 is about 816.9410424644.

The spelling of 545220461 in words is "five hundred forty-five million, two hundred twenty thousand, four hundred sixty-one".