55217004 has 12 divisors (see below), whose sum is σ = 128839704. Its totient is φ = 18405664.

The previous prime is 55216999. The next prime is 55217009. The reversal of 55217004 is 40071255.

55217004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55216999) and next prime (55217009).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (55217009) 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 3 ways as a sum of consecutive naturals, for example, 2300697 + ... + 2300720.

It is an arithmetic number, because the mean of its divisors is an integer number (10736642).

Almost surely, 2^55217004 is an apocalyptic number.

It is an amenable number.

55217004 is an abundant number, since it is smaller than the sum of its proper divisors (73622700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55217004 is a wasteful number, since it uses less digits than its factorization.

55217004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601424 (or 4601422 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 55217004 is about 7430.8144910232. The cubic root of 55217004 is about 380.7947448107.

Adding to 55217004 its reverse (40071255), we get a palindrome (95288259).

The spelling of 55217004 in words is "fifty-five million, two hundred seventeen thousand, four".