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55230725 = 52111071877
BaseRepresentation
bin1101001010110…
…0000100000101
310211221000022102
43102230010011
5103114340400
65251441445
71240311344
oct322540405
9124830272
1055230725
11291a3730
12165b6285
13b59a204
147499b5b
154cae9d5
hex34ac105

55230725 has 24 divisors (see below), whose sum is σ = 75450528. Its totient is φ = 39771200.

The previous prime is 55230709. The next prime is 55230821. The reversal of 55230725 is 52703255.

It is not a de Polignac number, because 55230725 - 24 = 55230709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28487 + ... + 30363.

It is an arithmetic number, because the mean of its divisors is an integer number (3143772).

Almost surely, 255230725 is an apocalyptic number.

55230725 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55230725 is a deficient number, since it is larger than the sum of its proper divisors (20219803).

55230725 is a wasteful number, since it uses less digits than its factorization.

55230725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 55230725 is about 7431.7376837453. The cubic root of 55230725 is about 380.8262837184.

It can be divided in two parts, 55230 and 725, that added together give a palindrome (55955).

The spelling of 55230725 in words is "fifty-five million, two hundred thirty thousand, seven hundred twenty-five".

Divisors: 1 5 11 25 55 107 275 535 1177 1877 2675 5885 9385 20647 29425 46925 103235 200839 516175 1004195 2209229 5020975 11046145 55230725