Base | Representation |
---|---|
bin | 1000000110000001… |
… | …1110110000011111 |
3 | 12121102110102121000 |
4 | 2001200132300133 |
5 | 13422212303310 |
6 | 555334041343 |
7 | 104562200214 |
oct | 20140366037 |
9 | 5542412530 |
10 | 2172775455 |
11 | a155253a4 |
12 | 5077a9253 |
13 | 2881bba66 |
14 | 1687d1b0b |
15 | cab404c0 |
hex | 8181ec1f |
2172775455 has 64 divisors (see below), whose sum is σ = 3958917120. Its totient is φ = 1130133888.
The previous prime is 2172775433. The next prime is 2172775463. The reversal of 2172775455 is 5545772712.
It is not a de Polignac number, because 2172775455 - 29 = 2172774943 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (45).
Together with 1786141665 it forms an amicable pair .
It is a self number, because there is not a number n which added to its sum of digits gives 2172775455.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2810449 + ... + 2811221.
It is an arithmetic number, because the mean of its divisors is an integer number (61858080).
Almost surely, 22172775455 is an apocalyptic number.
2172775455 is a deficient number, since it is larger than the sum of its proper divisors (1786141665).
2172775455 is a wasteful number, since it uses less digits than its factorization.
2172775455 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1277 (or 1271 counting only the distinct ones).
The product of its digits is 686000, while the sum is 45.
The square root of 2172775455 is about 46613.0395383094. The cubic root of 2172775455 is about 1295.2043137531.
The spelling of 2172775455 in words is "two billion, one hundred seventy-two million, seven hundred seventy-five thousand, four hundred fifty-five".
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