555642247 has 2 divisors, whose sum is σ = 555642248. Its totient is φ = 555642246.

The previous prime is 555642221. The next prime is 555642293. The reversal of 555642247 is 742246555.

555642247 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555642247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555642847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277821123 + 277821124.

It is an arithmetic number, because the mean of its divisors is an integer number (277821124).

Almost surely, 2^555642247 is an apocalyptic number.

555642247 is a deficient number, since it is larger than the sum of its proper divisors (1).

555642247 is an equidigital number, since it uses as much as digits as its factorization.

555642247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 40.

The square root of 555642247 is about 23572.0649710627. The cubic root of 555642247 is about 822.1134491169.

The spelling of 555642247 in words is "five hundred fifty-five million, six hundred forty-two thousand, two hundred forty-seven".