55223330 has 32 divisors (see below), whose sum is σ = 101138544. Its totient is φ = 21707776.

The previous prime is 55223323. The next prime is 55223339. The reversal of 55223330 is 3332255.

It can be written as a sum of positive squares in 8 ways, for example, as 30591961 + 24631369 = 5531^2 + 4963^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55223296 and 55223305.

It is not an unprimeable number, because it can be changed into a prime (55223339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236894 + ... + 237126.

Almost surely, 2^55223330 is an apocalyptic number.

55223330 is a deficient number, since it is larger than the sum of its proper divisors (45915214).

55223330 is a wasteful number, since it uses less digits than its factorization.

55223330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 2700, while the sum is 23.

The square root of 55223330 is about 7431.2401387655. The cubic root of 55223330 is about 380.8092863190.

Adding to 55223330 its reverse (3332255), we get a palindrome (58555585).

The spelling of 55223330 in words is "fifty-five million, two hundred twenty-three thousand, three hundred thirty".