555918481 has 2 divisors, whose sum is σ = 555918482. Its totient is φ = 555918480.

The previous prime is 555918469. The next prime is 555918593. The reversal of 555918481 is 184819555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492174225 + 63744256 = 22185^2 + 7984^2 .

It is a cyclic number.

It is not a de Polignac number, because 555918481 - 2⁵ = 555918449 is a prime.

It is a super-2 number, since 2×555918481² = 618090715034694722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555918401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277959240 + 277959241.

It is an arithmetic number, because the mean of its divisors is an integer number (277959241).

Almost surely, 2^555918481 is an apocalyptic number.

It is an amenable number.

555918481 is a deficient number, since it is larger than the sum of its proper divisors (1).

555918481 is an equidigital number, since it uses as much as digits as its factorization.

555918481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288000, while the sum is 46.

The square root of 555918481 is about 23577.9235939045. The cubic root of 555918481 is about 822.2496626998.

The spelling of 555918481 in words is "five hundred fifty-five million, nine hundred eighteen thousand, four hundred eighty-one".