555605261 has 2 divisors, whose sum is σ = 555605262. Its totient is φ = 555605260.

The previous prime is 555605257. The next prime is 555605321. The reversal of 555605261 is 162506555.

555605261 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., 408444100 + 147161161 = 20210^2 + 12131^2 .

It is a cyclic number.

It is not a de Polignac number, because 555605261 - 2² = 555605257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555605221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277802630 + 277802631.

It is an arithmetic number, because the mean of its divisors is an integer number (277802631).

Almost surely, 2^555605261 is an apocalyptic number.

It is an amenable number.

555605261 is a deficient number, since it is larger than the sum of its proper divisors (1).

555605261 is an equidigital number, since it uses as much as digits as its factorization.

555605261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 555605261 is about 23571.2804276730. The cubic root of 555605261 is about 822.0952075458.

The spelling of 555605261 in words is "five hundred fifty-five million, six hundred five thousand, two hundred sixty-one".