Search a number
-
+
2180275 = 5287211
BaseRepresentation
bin1000010100010010110011
311002202202221
420110102303
51024232100
6114421511
724350326
oct10242263
94082687
102180275
11125a089
12891897
135b4506
1440a7bd
152d101a
hex2144b3

2180275 has 6 divisors (see below), whose sum is σ = 2703572. Its totient is φ = 1744200.

The previous prime is 2180251. The next prime is 2180281. The reversal of 2180275 is 5720812.

It is not a de Polignac number, because 2180275 - 29 = 2179763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 87211 = 2180275 / (2 + 1 + 8 + 0 + 2 + 7 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43581 + ... + 43630.

22180275 is an apocalyptic number.

2180275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2180275 is a deficient number, since it is larger than the sum of its proper divisors (523297).

2180275 is an equidigital number, since it uses as much as digits as its factorization.

2180275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87221 (or 87216 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2180275 is about 1476.5754298376. The cubic root of 2180275 is about 129.6692776933.

The spelling of 2180275 in words is "two million, one hundred eighty thousand, two hundred seventy-five".

Divisors: 1 5 25 87211 436055 2180275