555527981 has 2 divisors, whose sum is σ = 555527982. Its totient is φ = 555527980.

The previous prime is 555527963. The next prime is 555528053. The reversal of 555527981 is 189725555.

555527981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549152356 + 6375625 = 23434^2 + 2525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555527981 is a prime.

It is a super-3 number, since 3×555527981³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555527911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277763990 + 277763991.

It is an arithmetic number, because the mean of its divisors is an integer number (277763991).

Almost surely, 2^555527981 is an apocalyptic number.

It is an amenable number.

555527981 is a deficient number, since it is larger than the sum of its proper divisors (1).

555527981 is an equidigital number, since it uses as much as digits as its factorization.

555527981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630000, while the sum is 47.

The square root of 555527981 is about 23569.6410876364. The cubic root of 555527981 is about 822.0570902781.

The spelling of 555527981 in words is "five hundred fifty-five million, five hundred twenty-seven thousand, nine hundred eighty-one".