555412261 has 2 divisors, whose sum is σ = 555412262. Its totient is φ = 555412260.

The previous prime is 555412241. The next prime is 555412307. The reversal of 555412261 is 162214555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361228036 + 194184225 = 19006^2 + 13935^2 .

It is a cyclic number.

It is not a de Polignac number, because 555412261 - 2⁵ = 555412229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555412241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277706130 + 277706131.

It is an arithmetic number, because the mean of its divisors is an integer number (277706131).

Almost surely, 2^555412261 is an apocalyptic number.

It is an amenable number.

555412261 is a deficient number, since it is larger than the sum of its proper divisors (1).

555412261 is an equidigital number, since it uses as much as digits as its factorization.

555412261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 31.

The square root of 555412261 is about 23567.1861069581. The cubic root of 555412261 is about 822.0000064133. Note that the first 5 decimals are identical.

The spelling of 555412261 in words is "five hundred fifty-five million, four hundred twelve thousand, two hundred sixty-one".