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2188025 = 52712503
BaseRepresentation
bin1000010110001011111001
311010011101222
420112023321
51030004100
6114521425
724412040
oct10261371
94104358
102188025
111264994
12896275
135b7bb8
1440d557
152d3485
hex2162f9

2188025 has 12 divisors (see below), whose sum is σ = 3100992. Its totient is φ = 1500240.

The previous prime is 2188001. The next prime is 2188031. The reversal of 2188025 is 5208812.

2188025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2188025 - 26 = 2187961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2187985 and 2188003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6077 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (258416).

22188025 is an apocalyptic number.

2188025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2188025 is a deficient number, since it is larger than the sum of its proper divisors (912967).

2188025 is a wasteful number, since it uses less digits than its factorization.

2188025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12520 (or 12515 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 2188025 is about 1479.1974175207. The cubic root of 2188025 is about 129.8227367038.

The spelling of 2188025 in words is "two million, one hundred eighty-eight thousand, twenty-five".

Divisors: 1 5 7 25 35 175 12503 62515 87521 312575 437605 2188025