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55556556 = 22311974339
BaseRepresentation
bin1101001111101…
…1100111001100
310212112120021020
43103323213030
5103210302211
65302434140
71243136316
oct323734714
9125476236
1055556556
11293a6510
1216732950
13b682603
1475427b6
154d26306
hex34fb9cc

55556556 has 48 divisors (see below), whose sum is σ = 142907520. Its totient is φ = 16657920.

The previous prime is 55556521. The next prime is 55556581. The reversal of 55556556 is 65565555.

It is a super-2 number, since 2×555565562 = 6173061829162272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10635 + ... + 14973.

It is an arithmetic number, because the mean of its divisors is an integer number (2977240).

Almost surely, 255556556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55556556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71453760).

55556556 is an abundant number, since it is smaller than the sum of its proper divisors (87350964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55556556 is a wasteful number, since it uses less digits than its factorization.

55556556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454 (or 4452 counting only the distinct ones).

The product of its digits is 562500, while the sum is 42.

The square root of 55556556 is about 7453.6270365507. The cubic root of 55556556 is about 381.5737046167.

The spelling of 55556556 in words is "fifty-five million, five hundred fifty-six thousand, five hundred fifty-six".

Divisors: 1 2 3 4 6 11 12 22 33 44 66 97 132 194 291 388 582 1067 1164 2134 3201 4268 4339 6402 8678 12804 13017 17356 26034 47729 52068 95458 143187 190916 286374 420883 572748 841766 1262649 1683532 2525298 4629713 5050596 9259426 13889139 18518852 27778278 55556556