55205724 has 48 divisors (see below), whose sum is σ = 148069376. Its totient is φ = 15681600.

The previous prime is 55205677. The next prime is 55205767. The reversal of 55205724 is 42750255.

It is a junction number, because it is equal to n+sod(n) for n = 55205691 and 55205700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13389 + ... + 17019.

Almost surely, 2^55205724 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 55205724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74034688).

55205724 is an abundant number, since it is smaller than the sum of its proper divisors (92863652).

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

55205724 is a wasteful number, since it uses less digits than its factorization.

55205724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 55205724 is about 7430.0554506679. The cubic root of 55205724 is about 380.7688128397.

Adding to 55205724 its reverse (42750255), we get a palindrome (97955979).

The spelling of 55205724 in words is "fifty-five million, two hundred five thousand, seven hundred twenty-four".