550055521 has 2 divisors, whose sum is σ = 550055522. Its totient is φ = 550055520.

The previous prime is 550055501. The next prime is 550055573. The reversal of 550055521 is 125550055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425844496 + 124211025 = 20636^2 + 11145^2 .

It is a cyclic number.

It is not a de Polignac number, because 550055521 - 2¹¹ = 550053473 is a prime.

It is a super-2 number, since 2×550055521² = 605122152365162882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 550055521.

It is not a weakly prime, because it can be changed into another prime (550055501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275027760 + 275027761.

It is an arithmetic number, because the mean of its divisors is an integer number (275027761).

Almost surely, 2^550055521 is an apocalyptic number.

It is an amenable number.

550055521 is a deficient number, since it is larger than the sum of its proper divisors (1).

550055521 is an equidigital number, since it uses as much as digits as its factorization.

550055521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 550055521 is about 23453.2624809428. The cubic root of 550055521 is about 819.3488390889.

The spelling of 550055521 in words is "five hundred fifty million, fifty-five thousand, five hundred twenty-one".