| Base | Representation |
|---|---|
| bin | 10111111111001… |
| … | …11010110101000 |
| 3 | 112000122022200111 |
| 4 | 23333213112220 |
| 5 | 403003210030 |
| 6 | 31544544104 |
| 7 | 4662250450 |
| oct | 1377472650 |
| 9 | 460568614 |
| 10 | 201225640 |
| 11 | a364a890 |
| 12 | 57482034 |
| 13 | 328c6135 |
| 14 | 1ca20d60 |
| 15 | 129ec62a |
| hex | bfe75a8 |
201225640 has 128 divisors (see below), whose sum is σ = 572313600. Its totient is φ = 61850880.
The previous prime is 201225631. The next prime is 201225649. The reversal of 201225640 is 46522102.
201225640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (201225631) and next prime (201225649).
It is a Harshad number since it is a multiple of its sum of digits (22).
It is not an unprimeable number, because it can be changed into a prime (201225649) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242907 + ... + 243733.
It is an arithmetic number, because the mean of its divisors is an integer number (4471200).
Almost surely, 2201225640 is an apocalyptic number.
201225640 is a gapful number since it is divisible by the number (20) 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 201225640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286156800).
201225640 is an abundant number, since it is smaller than the sum of its proper divisors (371087960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
201225640 is a wasteful number, since it uses less digits than its factorization.
201225640 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 935 (or 931 counting only the distinct ones).
The product of its (nonzero) digits is 960, while the sum is 22.
The square root of 201225640 is about 14185.4023559432. The cubic root of 201225640 is about 585.9957133724.
Adding to 201225640 its reverse (46522102), we get a palindrome (247747742).
The spelling of 201225640 in words is "two hundred one million, two hundred twenty-five thousand, six hundred forty".
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