550500521 has 2 divisors, whose sum is σ = 550500522. Its totient is φ = 550500520.

The previous prime is 550500499. The next prime is 550500523. The reversal of 550500521 is 125005055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354192400 + 196308121 = 18820^2 + 14011^2 .

It is a cyclic number.

It is not a de Polignac number, because 550500521 - 2²² = 546306217 is a prime.

Together with 550500523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550500523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275250260 + 275250261.

It is an arithmetic number, because the mean of its divisors is an integer number (275250261).

Almost surely, 2^550500521 is an apocalyptic number.

It is an amenable number.

550500521 is a deficient number, since it is larger than the sum of its proper divisors (1).

550500521 is an equidigital number, since it uses as much as digits as its factorization.

550500521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 550500521 is about 23462.7475160093. The cubic root of 550500521 is about 819.5697331256.

Adding to 550500521 its reverse (125005055), we get a palindrome (675505576).

The spelling of 550500521 in words is "five hundred fifty million, five hundred thousand, five hundred twenty-one".