| Base | Representation |
|---|---|
| bin | 10100100000010… |
| … | …01100010110000 |
| 3 | 102222122210021000 |
| 4 | 22100021202300 |
| 5 | 323013134202 |
| 6 | 25022402000 |
| 7 | 4156010625 |
| oct | 1220114260 |
| 9 | 388583230 |
| 10 | 172005552 |
| 11 | 89102354 |
| 12 | 49730300 |
| 13 | 29835144 |
| 14 | 18bb634c |
| 15 | 1017991c |
| hex | a4098b0 |
172005552 has 60 divisors (see below), whose sum is σ = 494503320. Its totient is φ = 57244320.
The previous prime is 172005551. The next prime is 172005557. The reversal of 172005552 is 255500271.
It is a happy number.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (172005551) 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, 272277 + ... + 272907.
It is an arithmetic number, because the mean of its divisors is an integer number (8241722).
Almost surely, 2172005552 is an apocalyptic number.
172005552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 172005552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247251660).
172005552 is an abundant number, since it is smaller than the sum of its proper divisors (322497768).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
172005552 is an frugal number, since it uses more digits than its factorization.
172005552 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1279 (or 636 counting only the distinct ones).
The product of its (nonzero) digits is 3500, while the sum is 27.
The square root of 172005552 is about 13115.0887149115. The cubic root of 172005552 is about 556.1357603717.
Multiplying 172005552 by its sum of digits (27), we get a square (4644149904 = 681482).
172005552 divided by its sum of digits (27) gives a square (6370576 = 25242).
The spelling of 172005552 in words is "one hundred seventy-two million, five thousand, five hundred fifty-two".
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