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21327272 = 2319193727
BaseRepresentation
bin101000101011…
…0110110101000
31111010112111222
41101112312220
520424433042
62041041212
7346164431
oct121266650
944115458
1021327272
111104754a
127186208
1345595b5
142b92488
151d142d2
hex1456da8

21327272 has 32 divisors (see below), whose sum is σ = 42369600. Its totient is φ = 10036224.

The previous prime is 21327263. The next prime is 21327289. The reversal of 21327272 is 27272312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28973 + ... + 29699.

It is an arithmetic number, because the mean of its divisors is an integer number (1324050).

Almost surely, 221327272 is an apocalyptic number.

It is an amenable number.

21327272 is a deficient number, since it is larger than the sum of its proper divisors (21042328).

21327272 is a wasteful number, since it uses less digits than its factorization.

21327272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 941 counting only the distinct ones).

The product of its digits is 2352, while the sum is 26.

The square root of 21327272 is about 4618.1459483217. The cubic root of 21327272 is about 277.3182404159.

Adding to 21327272 its reverse (27272312), we get a palindrome (48599584).

It can be divided in two parts, 213 and 27272, that multiplied together give a triangular number (5808936 = T3408).

The spelling of 21327272 in words is "twenty-one million, three hundred twenty-seven thousand, two hundred seventy-two".

Divisors: 1 2 4 8 19 38 76 152 193 386 727 772 1454 1544 2908 3667 5816 7334 13813 14668 27626 29336 55252 110504 140311 280622 561244 1122488 2665909 5331818 10663636 21327272