505305553 has 2 divisors, whose sum is σ = 505305554. Its totient is φ = 505305552.

The previous prime is 505305547. The next prime is 505305557. The reversal of 505305553 is 355503505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389786049 + 115519504 = 19743^2 + 10748^2 .

It is a cyclic number.

It is not a de Polignac number, because 505305553 - 2²¹ = 503208401 is a prime.

It is not a weakly prime, because it can be changed into another prime (505305557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252652776 + 252652777.

It is an arithmetic number, because the mean of its divisors is an integer number (252652777).

Almost surely, 2^505305553 is an apocalyptic number.

It is an amenable number.

505305553 is a deficient number, since it is larger than the sum of its proper divisors (1).

505305553 is an equidigital number, since it uses as much as digits as its factorization.

505305553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28125, while the sum is 31.

The square root of 505305553 is about 22479.0024912139. The cubic root of 505305553 is about 796.4980012289.

The spelling of 505305553 in words is "five hundred five million, three hundred five thousand, five hundred fifty-three".