55722 has 16 divisors (see below), whose sum is σ = 114912. Its totient is φ = 18000.

The previous prime is 55721. The next prime is 55733. The reversal of 55722 is 22755.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (55721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97 + ... + 347.

It is an arithmetic number, because the mean of its divisors is an integer number (7182).

2⁵⁵⁷²² is an apocalyptic number.

55722 is an abundant number, since it is smaller than the sum of its proper divisors (59190).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57456).

55722 is a wasteful number, since it uses less digits than its factorization.

55722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293.

The product of its digits is 700, while the sum is 21.

The square root of 55722 is about 236.0550783186. The cubic root of 55722 is about 38.1952096914.

It can be divided in two parts, 55 and 722, that added together give a palindrome (777).

The spelling of 55722 in words is "fifty-five thousand, seven hundred twenty-two".