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2099205 = 32546649
BaseRepresentation
bin1000000000100000000101
310221122120100
420000200011
51014133310
6112554313
723562063
oct10004005
93848510
102099205
111204189
12852999
13586644
143c9033
152b6ec0
hex200805

2099205 has 12 divisors (see below), whose sum is σ = 3638700. Its totient is φ = 1119552.

The previous prime is 2099203. The next prime is 2099213. The reversal of 2099205 is 5029902.

It can be written as a sum of positive squares in 2 ways, for example, as 1052676 + 1046529 = 1026^2 + 1023^2 .

It is not a de Polignac number, because 2099205 - 21 = 2099203 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099203) 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, 23280 + ... + 23369.

It is an arithmetic number, because the mean of its divisors is an integer number (303225).

22099205 is an apocalyptic number.

It is an amenable number.

2099205 is a deficient number, since it is larger than the sum of its proper divisors (1539495).

2099205 is a wasteful number, since it uses less digits than its factorization.

2099205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46660 (or 46657 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 2099205 is about 1448.8633475936. The cubic root of 2099205 is about 128.0417547697.

It can be divided in two parts, 2099 and 205, that added together give a square (2304 = 482).

The spelling of 2099205 in words is "two million, ninety-nine thousand, two hundred five".

Divisors: 1 3 5 9 15 45 46649 139947 233245 419841 699735 2099205