555161081 has 2 divisors, whose sum is σ = 555161082. Its totient is φ = 555161080.

The previous prime is 555161077. The next prime is 555161083. The reversal of 555161081 is 180161555.

555161081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448761856 + 106399225 = 21184^2 + 10315^2 .

It is a cyclic number.

It is not a de Polignac number, because 555161081 - 2² = 555161077 is a prime.

It is a super-2 number, since 2×555161081² = 616407651714177122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 555161083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (555161083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277580540 + 277580541.

It is an arithmetic number, because the mean of its divisors is an integer number (277580541).

Almost surely, 2^555161081 is an apocalyptic number.

It is an amenable number.

555161081 is a deficient number, since it is larger than the sum of its proper divisors (1).

555161081 is an equidigital number, since it uses as much as digits as its factorization.

555161081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 32.

The square root of 555161081 is about 23561.8564845812. The cubic root of 555161081 is about 821.8760737908.

The spelling of 555161081 in words is "five hundred fifty-five million, one hundred sixty-one thousand, eighty-one".