555605257 has 2 divisors, whose sum is σ = 555605258. Its totient is φ = 555605256.

The previous prime is 555605221. The next prime is 555605261. The reversal of 555605257 is 752506555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455224896 + 100380361 = 21336^2 + 10019^2 .

It is a cyclic number.

It is not a de Polignac number, because 555605257 - 2⁷ = 555605129 is a prime.

It is not a weakly prime, because it can be changed into another prime (555605957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277802628 + 277802629.

It is an arithmetic number, because the mean of its divisors is an integer number (277802629).

Almost surely, 2^555605257 is an apocalyptic number.

It is an amenable number.

555605257 is a deficient number, since it is larger than the sum of its proper divisors (1).

555605257 is an equidigital number, since it uses as much as digits as its factorization.

555605257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262500, while the sum is 40.

The square root of 555605257 is about 23571.2803428240. The cubic root of 555605257 is about 822.0952055730.

The spelling of 555605257 in words is "five hundred fifty-five million, six hundred five thousand, two hundred fifty-seven".