55111222 has 8 divisors (see below), whose sum is σ = 82698336. Its totient is φ = 27545112.

The previous prime is 55111219. The next prime is 55111237. The reversal of 55111222 is 22211155.

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

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 55111222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7668 + ... + 13000.

It is an arithmetic number, because the mean of its divisors is an integer number (10337292).

Almost surely, 2^55111222 is an apocalyptic number.

55111222 is a deficient number, since it is larger than the sum of its proper divisors (27587114).

55111222 is a wasteful number, since it uses less digits than its factorization.

55111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10502.

The product of its digits is 200, while the sum is 19.

The square root of 55111222 is about 7423.6932856901. The cubic root of 55111222 is about 380.5514201274.

Adding to 55111222 its reverse (22211155), we get a palindrome (77322377).

The spelling of 55111222 in words is "fifty-five million, one hundred eleven thousand, two hundred twenty-two".