55221011 has 8 divisors (see below), whose sum is σ = 58322880. Its totient is φ = 52138728.

The previous prime is 55221007. The next prime is 55221037. The reversal of 55221011 is 11012255.

55221011 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 55221011 - 2² = 55221007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55221041) 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, 1100 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (7290360).

Almost surely, 2^55221011 is an apocalyptic number.

55221011 is a deficient number, since it is larger than the sum of its proper divisors (3101869).

55221011 is a wasteful number, since it uses less digits than its factorization.

55221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9793.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 55221011 is about 7431.0841066429. The cubic root of 55221011 is about 380.8039557876.

Adding to 55221011 its reverse (11012255), we get a palindrome (66233266).

The spelling of 55221011 in words is "fifty-five million, two hundred twenty-one thousand, eleven".