550515571 has 2 divisors, whose sum is σ = 550515572. Its totient is φ = 550515570.

The previous prime is 550515551. The next prime is 550515599. The reversal of 550515571 is 175515055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550515571 is a prime.

It is not a weakly prime, because it can be changed into another prime (550515521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275257785 + 275257786.

It is an arithmetic number, because the mean of its divisors is an integer number (275257786).

Almost surely, 2^550515571 is an apocalyptic number.

550515571 is a deficient number, since it is larger than the sum of its proper divisors (1).

550515571 is an equidigital number, since it uses as much as digits as its factorization.

550515571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21875, while the sum is 34.

The square root of 550515571 is about 23463.0682349943. The cubic root of 550515571 is about 819.5772017301.

The spelling of 550515571 in words is "five hundred fifty million, five hundred fifteen thousand, five hundred seventy-one".