505495553 has 2 divisors, whose sum is σ = 505495554. Its totient is φ = 505495552.

The previous prime is 505495537. The next prime is 505495567. The reversal of 505495553 is 355594505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389351824 + 116143729 = 19732^2 + 10777^2 .

It is a cyclic number.

It is not a de Polignac number, because 505495553 - 2⁴ = 505495537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505495553.

It is not a weakly prime, because it can be changed into another prime (505495253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252747776 + 252747777.

It is an arithmetic number, because the mean of its divisors is an integer number (252747777).

Almost surely, 2^505495553 is an apocalyptic number.

It is an amenable number.

505495553 is a deficient number, since it is larger than the sum of its proper divisors (1).

505495553 is an equidigital number, since it uses as much as digits as its factorization.

505495553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 337500, while the sum is 41.

The square root of 505495553 is about 22483.2282601943. The cubic root of 505495553 is about 796.5978191546.

The spelling of 505495553 in words is "five hundred five million, four hundred ninety-five thousand, five hundred fifty-three".