550340521 has 2 divisors, whose sum is σ = 550340522. Its totient is φ = 550340520.

The previous prime is 550340519. The next prime is 550340533. The reversal of 550340521 is 125043055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378730521 + 171610000 = 19461^2 + 13100^2 .

It is a cyclic number.

It is not a de Polignac number, because 550340521 - 2¹ = 550340519 is a prime.

Together with 550340519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (550340561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275170260 + 275170261.

It is an arithmetic number, because the mean of its divisors is an integer number (275170261).

Almost surely, 2^550340521 is an apocalyptic number.

It is an amenable number.

550340521 is a deficient number, since it is larger than the sum of its proper divisors (1).

550340521 is an equidigital number, since it uses as much as digits as its factorization.

550340521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 550340521 is about 23459.3376078695. The cubic root of 550340521 is about 819.4903242612.

Adding to 550340521 its reverse (125043055), we get a palindrome (675383576).

The spelling of 550340521 in words is "five hundred fifty million, three hundred forty thousand, five hundred twenty-one".