505055501 has 2 divisors, whose sum is σ = 505055502. Its totient is φ = 505055500.

The previous prime is 505055489. The next prime is 505055519. The reversal of 505055501 is 105550505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437897476 + 67158025 = 20926^2 + 8195^2 .

It is a cyclic number.

It is not a de Polignac number, because 505055501 - 2⁶ = 505055437 is a prime.

It is a super-2 number, since 2×505055501² = 510162118180722002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505055521) 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, 252527750 + 252527751.

It is an arithmetic number, because the mean of its divisors is an integer number (252527751).

Almost surely, 2^505055501 is an apocalyptic number.

It is an amenable number.

505055501 is a deficient number, since it is larger than the sum of its proper divisors (1).

505055501 is an equidigital number, since it uses as much as digits as its factorization.

505055501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 505055501 is about 22473.4399013591. The cubic root of 505055501 is about 796.3665963930.

The spelling of 505055501 in words is "five hundred five million, fifty-five thousand, five hundred one".