Base | Representation |
---|---|
bin | 1101001011111… |
… | …1010101011001 |
3 | 10212002000120211 |
4 | 3102333111121 |
5 | 103124402112 |
6 | 5253251121 |
7 | 1241060434 |
oct | 322772531 |
9 | 125060524 |
10 | 55309657 |
11 | 29247a67 |
12 | 16633aa1 |
13 | b5c7110 |
14 | 74ba81b |
15 | 4cc80a7 |
hex | 34bf559 |
55309657 has 8 divisors (see below), whose sum is σ = 59910984. Its totient is φ = 50757888.
The previous prime is 55309637. The next prime is 55309669. The reversal of 55309657 is 75690355.
It can be written as a sum of positive squares in 4 ways, for example, as 2253001 + 53056656 = 1501^2 + 7284^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 55309657 - 219 = 54785369 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (55309637) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10048 + ... + 14545.
It is an arithmetic number, because the mean of its divisors is an integer number (7488873).
Almost surely, 255309657 is an apocalyptic number.
It is an amenable number.
55309657 is a deficient number, since it is larger than the sum of its proper divisors (4601327).
55309657 is a wasteful number, since it uses less digits than its factorization.
55309657 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 24779.
The product of its (nonzero) digits is 141750, while the sum is 40.
The square root of 55309657 is about 7437.0462550666. The cubic root of 55309657 is about 381.0076143816.
The spelling of 55309657 in words is "fifty-five million, three hundred nine thousand, six hundred fifty-seven".
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