550001111 has 4 divisors (see below), whose sum is σ = 600001224. Its totient is φ = 500001000.

The previous prime is 550001107. The next prime is 550001129. The reversal of 550001111 is 111100055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 550001111 - 2² = 550001107 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550001131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25000040 + ... + 25000061.

It is an arithmetic number, because the mean of its divisors is an integer number (150000306).

Almost surely, 2^550001111 is an apocalyptic number.

550001111 is a deficient number, since it is larger than the sum of its proper divisors (50000113).

550001111 is a wasteful number, since it uses less digits than its factorization.

550001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50000112.

The product of its (nonzero) digits is 25, while the sum is 14.

The square root of 550001111 is about 23452.1024857048. The cubic root of 550001111 is about 819.3218222766.

Adding to 550001111 its reverse (111100055), we get a palindrome (661101166).

The spelling of 550001111 in words is "five hundred fifty million, one thousand, one hundred eleven".