550500500521 has 2 divisors, whose sum is σ = 550500500522. Its totient is φ = 550500500520.

The previous prime is 550500500489. The next prime is 550500500569. The reversal of 550500500521 is 125005005055.

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., 335518977600 + 214981522921 = 579240^2 + 463661^2 .

It is a cyclic number.

It is not a de Polignac number, because 550500500521 - 2⁵ = 550500500489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550500500521.

It is not a weakly prime, because it can be changed into another prime (550500500821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275250250260 + 275250250261.

It is an arithmetic number, because the mean of its divisors is an integer number (275250250261).

Almost surely, 2^550500500521 is an apocalyptic number.

It is an amenable number.

550500500521 is a deficient number, since it is larger than the sum of its proper divisors (1).

550500500521 is an equidigital number, since it uses as much as digits as its factorization.

550500500521 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.

Adding to 550500500521 its reverse (125005005055), we get a palindrome (675505505576).

The spelling of 550500500521 in words is "five hundred fifty billion, five hundred million, five hundred thousand, five hundred twenty-one".