55213504 has 28 divisors (see below), whose sum is σ = 110443264. Its totient is φ = 27385344.

The previous prime is 55213481. The next prime is 55213517. The reversal of 55213504 is 40531255.

55213504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

55213504 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 4732 + ... + 11524.

Almost surely, 2^55213504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55213504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55221632).

55213504 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55213504 is a wasteful number, since it uses less digits than its factorization.

55213504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932 (or 6922 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55213504 is about 7430.5789814792. The cubic root of 55213504 is about 380.7866989210.

Adding to 55213504 its reverse (40531255), we get a palindrome (95744759).

It can be divided in two parts, 5521 and 3504, that added together give a square (9025 = 95²).

The spelling of 55213504 in words is "fifty-five million, two hundred thirteen thousand, five hundred four".