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BaseRepresentation
bin1101011111101111
32210211101
431133233
53232104
61103531
7320110
oct153757
983741
1055279
1138594
1227ba7
131c213
1416207
15115a4
hexd7ef

55279 has 8 divisors (see below), whose sum is σ = 64800. Its totient is φ = 46176.

The previous prime is 55259. The next prime is 55291. The reversal of 55279 is 97255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55279 - 29 = 54767 is a prime.

It is a pancake number, because a pancake can be divided into 55279 parts by 332 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297 + ... + 445.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

255279 is an apocalyptic number.

55279 is the 149-th heptagonal number.

55279 is a deficient number, since it is larger than the sum of its proper divisors (9521).

55279 is a wasteful number, since it uses less digits than its factorization.

55279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its digits is 3150, while the sum is 28.

The square root of 55279 is about 235.1148655445. The cubic root of 55279 is about 38.0937206489.

The spelling of 55279 in words is "fifty-five thousand, two hundred seventy-nine".

Divisors: 1 7 53 149 371 1043 7897 55279