55330 has 16 divisors (see below), whose sum is σ = 108864. Its totient is φ = 20080.

The previous prime is 55313. The next prime is 55331. The reversal of 55330 is 3355.

It is a happy number.

It is a super-2 number, since 2×55330² = 6122817800, which contains 22 as substring.

It is a nialpdrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (55331) by changing a digit.

55330 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 361.

It is an arithmetic number, because the mean of its divisors is an integer number (6804).

2⁵⁵³³⁰ is an apocalyptic number.

55330 is a deficient number, since it is larger than the sum of its proper divisors (53534).

55330 is a wasteful number, since it uses less digits than its factorization.

55330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 225, while the sum is 16.

The square root of 55330 is about 235.2232981658. The cubic root of 55330 is about 38.1054320438.

Adding to 55330 its product of nonzero digits (225), we get a palindrome (55555).

Adding to 55330 its reverse (3355), we get a palindrome (58685).

It can be divided in two parts, 5 and 5330, that added together give a palindrome (5335).

The spelling of 55330 in words is "fifty-five thousand, three hundred thirty".