556913551 has 2 divisors, whose sum is σ = 556913552. Its totient is φ = 556913550.

The previous prime is 556913549. The next prime is 556913629. The reversal of 556913551 is 155319655.

556913551 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 not a de Polignac number, because 556913551 - 2¹ = 556913549 is a prime.

Together with 556913549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556913501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278456775 + 278456776.

It is an arithmetic number, because the mean of its divisors is an integer number (278456776).

Almost surely, 2^556913551 is an apocalyptic number.

556913551 is a deficient number, since it is larger than the sum of its proper divisors (1).

556913551 is an equidigital number, since it uses as much as digits as its factorization.

556913551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101250, while the sum is 40.

The square root of 556913551 is about 23599.0158904985. The cubic root of 556913551 is about 822.7399673675.

The spelling of 556913551 in words is "five hundred fifty-six million, nine hundred thirteen thousand, five hundred fifty-one".