Base | Representation |
---|---|
bin | 1001010001001… |
… | …00000010010001 |
3 | 12102021201021200 |
4 | 10220210002101 |
5 | 124400222400 |
6 | 11414141413 |
7 | 1632540501 |
oct | 450440221 |
9 | 172251250 |
10 | 77742225 |
11 | 3a979980 |
12 | 22051869 |
13 | 1314c822 |
14 | a479a01 |
15 | 6c59b00 |
hex | 4a24091 |
77742225 has 72 divisors (see below), whose sum is σ = 153900864. Its totient is φ = 37200000.
The previous prime is 77742211. The next prime is 77742229. The reversal of 77742225 is 52224777.
It is not a de Polignac number, because 77742225 - 27 = 77742097 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 77742225.
It is not an unprimeable number, because it can be changed into a prime (77742229) by changing a digit.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 249820 + ... + 250130.
It is an arithmetic number, because the mean of its divisors is an integer number (2137512).
Almost surely, 277742225 is an apocalyptic number.
77742225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.
It is an amenable number.
77742225 is a deficient number, since it is larger than the sum of its proper divisors (76158639).
77742225 is a wasteful number, since it uses less digits than its factorization.
77742225 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 439 (or 431 counting only the distinct ones).
The product of its digits is 54880, while the sum is 36.
The square root of 77742225 is about 8817.1551534494. The cubic root of 77742225 is about 426.7946715406.
It can be divided in two parts, 7774 and 2225, that added together give a palindrome (9999).
The spelling of 77742225 in words is "seventy-seven million, seven hundred forty-two thousand, two hundred twenty-five".
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