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50921 = 133917
BaseRepresentation
bin1100011011101001
32120211222
430123221
53112141
61031425
7301313
oct143351
976758
1050921
1135292
1225575
131a240
14147b3
151014b
hexc6e9

50921 has 4 divisors (see below), whose sum is σ = 54852. Its totient is φ = 46992.

The previous prime is 50909. The next prime is 50923. The reversal of 50921 is 12905.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24025 + 26896 = 155^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 50921 - 26 = 50857 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50921.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 50921.

It is not an unprimeable number, because it can be changed into a prime (50923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946 + ... + 1971.

It is an arithmetic number, because the mean of its divisors is an integer number (13713).

250921 is an apocalyptic number.

It is an amenable number.

50921 is a deficient number, since it is larger than the sum of its proper divisors (3931).

50921 is a wasteful number, since it uses less digits than its factorization.

50921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 50921 is about 225.6568190860. The cubic root of 50921 is about 37.0651396958.

The spelling of 50921 in words is "fifty thousand, nine hundred twenty-one".

Divisors: 1 13 3917 50921