550418521 has 9 divisors (see below), whose sum is σ = 570758461. Its totient is φ = 530781664.

The previous prime is 550418513. The next prime is 550418587. The reversal of 550418521 is 125814055.

The square root of 550418521 is 23461.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 106894921 + 443523600 = 10339^2 + 21060^2 .

It is not a de Polignac number, because 550418521 - 2³ = 550418513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550418821) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 679965 + ... + 680773.

Almost surely, 2^550418521 is an apocalyptic number.

550418521 is the 23461-st square number.

550418521 is the 11731-st centered octagonal number.

It is an amenable number.

550418521 is a deficient number, since it is larger than the sum of its proper divisors (20339940).

550418521 is an frugal number, since it uses more digits than its factorization.

550418521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 31.

The cubic root of 550418521 is about 819.5290380050.

It can be divided in two parts, 5504 and 18521, that added together give a square (24025 = 155²).

The spelling of 550418521 in words is "five hundred fifty million, four hundred eighteen thousand, five hundred twenty-one".