556521361 has 16 divisors (see below), whose sum is σ = 624067200. Its totient is φ = 491990400.

The previous prime is 556521353. The next prime is 556521373. The reversal of 556521361 is 163125655.

556521361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 556521361 - 2³ = 556521353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556521341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55060 + ... + 64378.

It is an arithmetic number, because the mean of its divisors is an integer number (39004200).

Almost surely, 2^556521361 is an apocalyptic number.

It is an amenable number.

556521361 is a deficient number, since it is larger than the sum of its proper divisors (67545839).

556521361 is a wasteful number, since it uses less digits than its factorization.

556521361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9480.

The product of its digits is 27000, while the sum is 34.

The square root of 556521361 is about 23590.7049703904. The cubic root of 556521361 is about 822.5467918675.

The spelling of 556521361 in words is "five hundred fifty-six million, five hundred twenty-one thousand, three hundred sixty-one".