55505222 has 4 divisors (see below), whose sum is σ = 83257836. Its totient is φ = 27752610.

The previous prime is 55505207. The next prime is 55505227. The reversal of 55505222 is 22250555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22250555 = 5 ⋅4450111.

It is a junction number, because it is equal to n+sod(n) for n = 55505191 and 55505200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13876304 + ... + 13876307.

It is an arithmetic number, because the mean of its divisors is an integer number (20814459).

Almost surely, 2^55505222 is an apocalyptic number.

55505222 is a deficient number, since it is larger than the sum of its proper divisors (27752614).

55505222 is a wasteful number, since it uses less digits than its factorization.

55505222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27752613.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 55505222 is about 7450.1826823240. The cubic root of 55505222 is about 381.4561442899.

Adding to 55505222 its reverse (22250555), we get a palindrome (77755777).

The spelling of 55505222 in words is "fifty-five million, five hundred five thousand, two hundred twenty-two".