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55007 = 67821
BaseRepresentation
bin1101011011011111
32210110022
431123133
53230012
61102355
7316241
oct153337
983408
1055007
1138367
12279bb
131c064
1416091
1511472
hexd6df

55007 has 4 divisors (see below), whose sum is σ = 55896. Its totient is φ = 54120.

The previous prime is 55001. The next prime is 55009. The reversal of 55007 is 70055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70055 = 514011.

It is a cyclic number.

It is not a de Polignac number, because 55007 - 28 = 54751 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

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 55007.

It is not an unprimeable number, because it can be changed into a prime (55001) 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, 344 + ... + 477.

It is an arithmetic number, because the mean of its divisors is an integer number (13974).

255007 is an apocalyptic number.

55007 is a deficient number, since it is larger than the sum of its proper divisors (889).

55007 is an equidigital number, since it uses as much as digits as its factorization.

55007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 175, while the sum is 17.

The square root of 55007 is about 234.5357115665. The cubic root of 55007 is about 38.0311379129.

The spelling of 55007 in words is "fifty-five thousand, seven".

Divisors: 1 67 821 55007