556521289 has 2 divisors, whose sum is σ = 556521290. Its totient is φ = 556521288.

The previous prime is 556521233. The next prime is 556521293. The reversal of 556521289 is 982125655.

556521289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528080400 + 28440889 = 22980^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 556521289 - 2⁹ = 556520777 is a prime.

It is a super-2 number, since 2×556521289² = 619431890220443042, which contains 22 as substring.

It is equal to p_29169583 and since 556521289 and 29169583 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 (556521089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278260644 + 278260645.

It is an arithmetic number, because the mean of its divisors is an integer number (278260645).

Almost surely, 2^556521289 is an apocalyptic number.

It is an amenable number.

556521289 is a deficient number, since it is larger than the sum of its proper divisors (1).

556521289 is an equidigital number, since it uses as much as digits as its factorization.

556521289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 43.

The square root of 556521289 is about 23590.7034443655. The cubic root of 556521289 is about 822.5467563951.

The spelling of 556521289 in words is "five hundred fifty-six million, five hundred twenty-one thousand, two hundred eighty-nine".