550565123 has 2 divisors, whose sum is σ = 550565124. Its totient is φ = 550565122.

The previous prime is 550565107. The next prime is 550565131. The reversal of 550565123 is 321565055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550565123 - 2⁴ = 550565107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550565123.

It is not a weakly prime, because it can be changed into another prime (550565153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275282561 + 275282562.

It is an arithmetic number, because the mean of its divisors is an integer number (275282562).

Almost surely, 2^550565123 is an apocalyptic number.

550565123 is a deficient number, since it is larger than the sum of its proper divisors (1).

550565123 is an equidigital number, since it uses as much as digits as its factorization.

550565123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 550565123 is about 23464.1241686111. The cubic root of 550565123 is about 819.6017910867.

The spelling of 550565123 in words is "five hundred fifty million, five hundred sixty-five thousand, one hundred twenty-three".