55405170 has 48 divisors (see below), whose sum is σ = 145693080. Its totient is φ = 14606592.

The previous prime is 55405157. The next prime is 55405223. The reversal of 55405170 is 7150455.

55405170 is a `hidden beast` number, since 5 + 540 + 51 + 70 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 40030929 + 15374241 = 6327^2 + 3921^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4552 + ... + 11468.

Almost surely, 2^55405170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55405170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72846540).

55405170 is an abundant number, since it is smaller than the sum of its proper divisors (90287910).

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

55405170 is a wasteful number, since it uses less digits than its factorization.

55405170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019 (or 7016 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 55405170 is about 7443.4649189742. The cubic root of 55405170 is about 381.2268060780.

The spelling of 55405170 in words is "fifty-five million, four hundred five thousand, one hundred seventy".