505525081 has 2 divisors, whose sum is σ = 505525082. Its totient is φ = 505525080.

The previous prime is 505525067. The next prime is 505525109. The reversal of 505525081 is 180525505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383533056 + 121992025 = 19584^2 + 11045^2 .

It is a cyclic number.

It is not a de Polignac number, because 505525081 - 2⁷ = 505524953 is a prime.

It is a super-2 number, since 2×505525081² = 511111215040113122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505525021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252762540 + 252762541.

It is an arithmetic number, because the mean of its divisors is an integer number (252762541).

Almost surely, 2^505525081 is an apocalyptic number.

It is an amenable number.

505525081 is a deficient number, since it is larger than the sum of its proper divisors (1).

505525081 is an equidigital number, since it uses as much as digits as its factorization.

505525081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10000, while the sum is 31.

The square root of 505525081 is about 22483.8849178695. The cubic root of 505525081 is about 796.6133296652.

The spelling of 505525081 in words is "five hundred five million, five hundred twenty-five thousand, eighty-one".