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50813 = 721761
BaseRepresentation
bin1100011001111101
32120200222
430121331
53111223
61031125
7301100
oct143175
976628
1050813
11351a4
12254a5
131a189
1414737
15100c8
hexc67d

50813 has 12 divisors (see below), whose sum is σ = 63612. Its totient is φ = 40320.

The previous prime is 50789. The next prime is 50821. The reversal of 50813 is 31805.

It can be written as a sum of positive squares in 2 ways, for example, as 17689 + 33124 = 133^2 + 182^2 .

It is not a de Polignac number, because 50813 - 210 = 49789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 50791 and 50800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 803 + ... + 863.

It is an arithmetic number, because the mean of its divisors is an integer number (5301).

250813 is an apocalyptic number.

It is an amenable number.

50813 is a deficient number, since it is larger than the sum of its proper divisors (12799).

50813 is a wasteful number, since it uses less digits than its factorization.

50813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 50813 is about 225.4173906335. The cubic root of 50813 is about 37.0389169293.

The spelling of 50813 in words is "fifty thousand, eight hundred thirteen".

Divisors: 1 7 17 49 61 119 427 833 1037 2989 7259 50813