550459561 has 8 divisors (see below), whose sum is σ = 555056424. Its totient is φ = 545871360.

The previous prime is 550459523. The next prime is 550459579. The reversal of 550459561 is 165954055.

It can be written as a sum of positive squares in 4 ways, for example, as 247873536 + 302586025 = 15744^2 + 17395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 550459561 - 2⁷ = 550459433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550459661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201541 + ... + 204253.

It is an arithmetic number, because the mean of its divisors is an integer number (69382053).

Almost surely, 2^550459561 is an apocalyptic number.

It is an amenable number.

550459561 is a deficient number, since it is larger than the sum of its proper divisors (4596863).

550459561 is a wasteful number, since it uses less digits than its factorization.

550459561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 550459561 is about 23461.8746267215. The cubic root of 550459561 is about 819.5494059217.

The spelling of 550459561 in words is "five hundred fifty million, four hundred fifty-nine thousand, five hundred sixty-one".