5555681 has 2 divisors, whose sum is σ = 5555682. Its totient is φ = 5555680.

The previous prime is 5555677. The next prime is 5555689. The reversal of 5555681 is 1865555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4774225 + 781456 = 2185^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555681 - 2² = 5555677 is a prime.

It is a super-2 number, since 2×5555681² = 61731182747522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5555689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777840 + 2777841.

It is an arithmetic number, because the mean of its divisors is an integer number (2777841).

Almost surely, 2^5555681 is an apocalyptic number.

It is an amenable number.

5555681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555681 is an equidigital number, since it uses as much as digits as its factorization.

5555681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 35.

The square root of 5555681 is about 2357.0492145901. The cubic root of 5555681 is about 177.1110945665. Note that the first 3 decimals are identical.

The spelling of 5555681 in words is "five million, five hundred fifty-five thousand, six hundred eighty-one".