55212233 has 8 divisors (see below), whose sum is σ = 58545120. Its totient is φ = 51922080.

The previous prime is 55212217. The next prime is 55212239. The reversal of 55212233 is 33221255.

55212233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55212233 - 2⁴ = 55212217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55212199 and 55212208.

It is not an unprimeable number, because it can be changed into a prime (55212239) 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 in 7 ways as a sum of consecutive naturals, for example, 8003 + ... + 13208.

It is an arithmetic number, because the mean of its divisors is an integer number (7318140).

Almost surely, 2^55212233 is an apocalyptic number.

It is an amenable number.

55212233 is a deficient number, since it is larger than the sum of its proper divisors (3332887).

55212233 is a wasteful number, since it uses less digits than its factorization.

55212233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21367.

The product of its digits is 1800, while the sum is 23.

The square root of 55212233 is about 7430.4934560230. The cubic root of 55212233 is about 380.7837770295.

Adding to 55212233 its reverse (33221255), we get a palindrome (88433488).

The spelling of 55212233 in words is "fifty-five million, two hundred twelve thousand, two hundred thirty-three".