551122111 has 4 divisors (see below), whose sum is σ = 552302712. Its totient is φ = 549941512.

The previous prime is 551122079. The next prime is 551122139. The reversal of 551122111 is 111221155.

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 551122111 - 2⁵ = 551122079 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 (551122181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589600 + ... + 590533.

It is an arithmetic number, because the mean of its divisors is an integer number (138075678).

Almost surely, 2^551122111 is an apocalyptic number.

551122111 is a deficient number, since it is larger than the sum of its proper divisors (1180601).

551122111 is a wasteful number, since it uses less digits than its factorization.

551122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180600.

The product of its digits is 100, while the sum is 19.

The square root of 551122111 is about 23475.9900962664. The cubic root of 551122111 is about 819.8780856824.

Adding to 551122111 its reverse (111221155), we get a palindrome (662343266).

The spelling of 551122111 in words is "five hundred fifty-one million, one hundred twenty-two thousand, one hundred eleven".