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56291 = 181311
BaseRepresentation
bin1101101111100011
32212012212
431233203
53300131
61112335
7323054
oct155743
985185
1056291
1139324
12286ab
131c811
141672b
1511a2b
hexdbe3

56291 has 4 divisors (see below), whose sum is σ = 56784. Its totient is φ = 55800.

The previous prime is 56269. The next prime is 56299. The reversal of 56291 is 19265.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19265 = 53853.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-56291 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (56299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26 + ... + 336.

It is an arithmetic number, because the mean of its divisors is an integer number (14196).

256291 is an apocalyptic number.

56291 is a deficient number, since it is larger than the sum of its proper divisors (493).

56291 is a wasteful number, since it uses less digits than its factorization.

56291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 540, while the sum is 23.

The square root of 56291 is about 237.2572443573. The cubic root of 56291 is about 38.3247785993.

The spelling of 56291 in words is "fifty-six thousand, two hundred ninety-one".

Divisors: 1 181 311 56291