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50868581 = 297692281
BaseRepresentation
bin1100001000001…
…1000101100101
310112201101120112
43002003011211
5101010243311
65014142405
71155242621
oct302030545
9115641515
1050868581
1126794355
1215051a05
13a70086a
146a82181
1546ec28b
hex3083165

50868581 has 8 divisors (see below), whose sum is σ = 52714200. Its totient is φ = 49029120.

The previous prime is 50868569. The next prime is 50868619. The reversal of 50868581 is 18586805.

It can be written as a sum of positive squares in 4 ways, for example, as 7756225 + 43112356 = 2785^2 + 6566^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-50868581 is a prime.

It is a super-2 number, since 2×508685812 = 5175225065907122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50868541) 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, 21161 + ... + 23441.

It is an arithmetic number, because the mean of its divisors is an integer number (6589275).

Almost surely, 250868581 is an apocalyptic number.

It is an amenable number.

50868581 is a deficient number, since it is larger than the sum of its proper divisors (1845619).

50868581 is a wasteful number, since it uses less digits than its factorization.

50868581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079.

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 50868581 is about 7132.2213229821. The cubic root of 50868581 is about 370.5241682029.

The spelling of 50868581 in words is "fifty million, eight hundred sixty-eight thousand, five hundred eighty-one".

Divisors: 1 29 769 2281 22301 66149 1754089 50868581