556553551 has 2 divisors, whose sum is σ = 556553552. Its totient is φ = 556553550.

The previous prime is 556553537. The next prime is 556553573. The reversal of 556553551 is 155355655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556553551 - 2¹⁷ = 556422479 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 (556553251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278276775 + 278276776.

It is an arithmetic number, because the mean of its divisors is an integer number (278276776).

Almost surely, 2^556553551 is an apocalyptic number.

556553551 is a deficient number, since it is larger than the sum of its proper divisors (1).

556553551 is an equidigital number, since it uses as much as digits as its factorization.

556553551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 281250, while the sum is 40.

The square root of 556553551 is about 23591.3872207634. The cubic root of 556553551 is about 822.5626506602.

The spelling of 556553551 in words is "five hundred fifty-six million, five hundred fifty-three thousand, five hundred fifty-one".