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2180212 = 221928687
BaseRepresentation
bin1000010100010001110100
311002202200121
420110101310
51024231322
6114421324
724350206
oct10242164
94082617
102180212
11125a031
12891844
135b4488
1440a776
152d0ec7
hex214474

2180212 has 12 divisors (see below), whose sum is σ = 4016320. Its totient is φ = 1032696.

The previous prime is 2180183. The next prime is 2180219. The reversal of 2180212 is 2120812.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14268 + ... + 14419.

22180212 is an apocalyptic number.

It is an amenable number.

2180212 is a deficient number, since it is larger than the sum of its proper divisors (1836108).

2180212 is a wasteful number, since it uses less digits than its factorization.

2180212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28710 (or 28708 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2180212 is about 1476.5540965369. The cubic root of 2180212 is about 129.6680287311.

The spelling of 2180212 in words is "two million, one hundred eighty thousand, two hundred twelve".

Divisors: 1 2 4 19 38 76 28687 57374 114748 545053 1090106 2180212