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56309 = 115119
BaseRepresentation
bin1101101111110101
32212020112
431233311
53300214
61112405
7323111
oct155765
985215
1056309
1139340
1228705
131c826
1416741
1511a3e
hexdbf5

56309 has 4 divisors (see below), whose sum is σ = 61440. Its totient is φ = 51180.

The previous prime is 56299. The next prime is 56311. The reversal of 56309 is 90365.

56309 = 1362 + 1372 + 1382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56309 - 28 = 56053 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56359) 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, 2549 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (15360).

256309 is an apocalyptic number.

It is an amenable number.

56309 is a deficient number, since it is larger than the sum of its proper divisors (5131).

56309 is a wasteful number, since it uses less digits than its factorization.

56309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 56309 is about 237.2951748351. The cubic root of 56309 is about 38.3288631628.

The spelling of 56309 in words is "fifty-six thousand, three hundred nine".

Divisors: 1 11 5119 56309