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2180057 = 11243419
BaseRepresentation
bin1000010100001111011001
311002202110212
420110033121
51024230212
6114420505
724346565
oct10241731
94082425
102180057
111259a00
12891735
135b4399
1440a6a5
152d0e22
hex2143d9

2180057 has 12 divisors (see below), whose sum is σ = 2457840. Its totient is φ = 1931160.

The previous prime is 2180051. The next prime is 2180071. The reversal of 2180057 is 7500812.

It is not a de Polignac number, because 2180057 - 26 = 2179993 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2180051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4994 + ... + 5412.

It is an arithmetic number, because the mean of its divisors is an integer number (204820).

22180057 is an apocalyptic number.

It is an amenable number.

2180057 is a deficient number, since it is larger than the sum of its proper divisors (277783).

2180057 is a wasteful number, since it uses less digits than its factorization.

2180057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2180057 is about 1476.5016085328. The cubic root of 2180057 is about 129.6649557851.

Adding to 2180057 its reverse (7500812), we get a palindrome (9680869).

The spelling of 2180057 in words is "two million, one hundred eighty thousand, fifty-seven".

Divisors: 1 11 43 121 419 473 4609 5203 18017 50699 198187 2180057