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21144310 = 2511211911
BaseRepresentation
bin101000010101…
…0001011110110
31110210020112121
41100222023312
520403104220
62033110154
7344503135
oct120521366
943706477
1021144310
1110a32040
1270b835a
1344c4235
142b4591c
151cc9eaa
hex142a2f6

21144310 has 32 divisors (see below), whose sum is σ = 41762304. Its totient is φ = 7644000.

The previous prime is 21144307. The next prime is 21144323. The reversal of 21144310 is 1344112.

It is a super-2 number, since 2×211443102 = 894163690752200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22755 + ... + 23665.

It is an arithmetic number, because the mean of its divisors is an integer number (1305072).

Almost surely, 221144310 is an apocalyptic number.

21144310 is a deficient number, since it is larger than the sum of its proper divisors (20617994).

21144310 is a wasteful number, since it uses less digits than its factorization.

21144310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21144310 is about 4598.2942489580. The cubic root of 21144310 is about 276.5229443359.

Adding to 21144310 its reverse (1344112), we get a palindrome (22488422).

It can be divided in two parts, 211 and 44310, that added together give a square (44521 = 2112).

The spelling of 21144310 in words is "twenty-one million, one hundred forty-four thousand, three hundred ten".

Divisors: 1 2 5 10 11 22 55 110 211 422 911 1055 1822 2110 2321 4555 4642 9110 10021 11605 20042 23210 50105 100210 192221 384442 961105 1922210 2114431 4228862 10572155 21144310