Search a number
-
+
55555500 = 223537111337
BaseRepresentation
bin1101001111101…
…1010110101100
310212112111211010
43103323112230
5103210234000
65302425220
71243133250
oct323732654
9125474733
1055555500
11293a5740
1216732210
13b681ca0
147542260
154d25d50
hex34fb5ac

55555500 has 384 divisors, whose sum is σ = 223082496. Its totient is φ = 10368000.

The previous prime is 55555481. The next prime is 55555517. The reversal of 55555500 is 555555.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1501482 + ... + 1501518.

It is an arithmetic number, because the mean of its divisors is an integer number (580944).

Almost surely, 255555500 is an apocalyptic number.

55555500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111541248).

55555500 is an abundant number, since it is smaller than the sum of its proper divisors (167526996).

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

55555500 is a wasteful number, since it uses less digits than its factorization.

55555500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 55555500 is about 7453.5561982184. The cubic root of 55555500 is about 381.5712869939.

55555500 divided by its sum of digits (30) gives a triangular number (1851850 = T1924).

Subtracting from 55555500 its reverse (555555), we obtain a palindrome (54999945).

Multiplying 55555500 by its reverse (555555), we get a square (30864135802500 = 55555502).

55555500 divided by its reverse (555555) gives a square (100 = 102).

It can be divided in two parts, 555 and 55500, that multiplied together give a square (30802500 = 55502).

The spelling of 55555500 in words is "fifty-five million, five hundred fifty-five thousand, five hundred".