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21552150 = 2352236247
BaseRepresentation
bin101001000110…
…1110000010110
31111112221222210
41102031300112
521004132100
62045534250
7351122154
oct122156026
944487883
1021552150
11111904a4
127274386
134607a69
142c103d4
151d5ac50
hex148dc16

21552150 has 48 divisors (see below), whose sum is σ = 55782144. Its totient is φ = 5496480.

The previous prime is 21552143. The next prime is 21552197. The reversal of 21552150 is 5125512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (1162128).

Almost surely, 221552150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21552150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27891072).

21552150 is an abundant number, since it is smaller than the sum of its proper divisors (34229994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21552150 is a wasteful number, since it uses less digits than its factorization.

21552150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 21552150 is about 4642.4293209482. The cubic root of 21552150 is about 278.2895298017.

Adding to 21552150 its reverse (5125512), we get a palindrome (26677662).

The spelling of 21552150 in words is "twenty-one million, five hundred fifty-two thousand, one hundred fifty".

Divisors: 1 2 3 5 6 10 15 23 25 30 46 50 69 75 115 138 150 230 345 575 690 1150 1725 3450 6247 12494 18741 31235 37482 62470 93705 143681 156175 187410 287362 312350 431043 468525 718405 862086 937050 1436810 2155215 3592025 4310430 7184050 10776075 21552150