55170 has 24 divisors (see below), whose sum is σ = 143676. Its totient is φ = 14688.

The previous prime is 55163. The next prime is 55171. The reversal of 55170 is 7155.

It is a happy number.

55170 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 45369 + 9801 = 213^2 + 99^2 .

It is a super-5 number, since 5×55170⁵ (a number of 25 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55170.

It is not an unprimeable number, because it can be changed into a prime (55171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217 + ... + 396.

2⁵⁵¹⁷⁰ is an apocalyptic number.

55170 is an abundant number, since it is smaller than the sum of its proper divisors (88506).

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 (71838).

55170 is a wasteful number, since it uses less digits than its factorization.

55170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 175, while the sum is 18.

The square root of 55170 is about 234.8829495728. The cubic root of 55170 is about 38.0686662420.

It can be divided in two parts, 55 and 170, that added together give a square (225 = 15²).

The spelling of 55170 in words is "fifty-five thousand, one hundred seventy".