555255409 has 2 divisors, whose sum is σ = 555255410. Its totient is φ = 555255408.

The previous prime is 555255359. The next prime is 555255433. The reversal of 555255409 is 904552555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420045025 + 135210384 = 20495^2 + 11628^2 .

It is a cyclic number.

It is not a de Polignac number, because 555255409 - 2²⁷ = 421037681 is a prime.

It is equal to p_29106778 and since 555255409 and 29106778 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (555255209) 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, 277627704 + 277627705.

It is an arithmetic number, because the mean of its divisors is an integer number (277627705).

Almost surely, 2^555255409 is an apocalyptic number.

It is an amenable number.

555255409 is a deficient number, since it is larger than the sum of its proper divisors (1).

555255409 is an equidigital number, since it uses as much as digits as its factorization.

555255409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225000, while the sum is 40.

The square root of 555255409 is about 23563.8581094014. The cubic root of 555255409 is about 821.9226197625.

The spelling of 555255409 in words is "five hundred fifty-five million, two hundred fifty-five thousand, four hundred nine".