550211111 has 2 divisors, whose sum is σ = 550211112. Its totient is φ = 550211110.

The previous prime is 550211099. The next prime is 550211153. The reversal of 550211111 is 111112055.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550211111 is a prime.

It is a Chen prime.

550211111 is a modest number, since divided by 11111 gives 5502 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 550211111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550211161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275105555 + 275105556.

It is an arithmetic number, because the mean of its divisors is an integer number (275105556).

Almost surely, 2^550211111 is an apocalyptic number.

550211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

550211111 is an equidigital number, since it uses as much as digits as its factorization.

550211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 17.

The square root of 550211111 is about 23456.5792689386. The cubic root of 550211111 is about 819.4260861200.

Adding to 550211111 its reverse (111112055), we get a palindrome (661323166).

The spelling of 550211111 in words is "five hundred fifty million, two hundred eleven thousand, one hundred eleven".